MCQs / Engineering Reviewer - Electrical Circuits Part 1

<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td style="text-align: center;"><a href="http://1.bp.blogspot.com/-GpaZzWMscSk/VQumACOuURI/AAAAAAAABIw/_DxlbRSFkTQ/s1600/mcqs-electrical-circuits.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="MCQs on Electrical Circuits" border="0" src="http://1.bp.blogspot.com/-GpaZzWMscSk/VQumACOuURI/AAAAAAAABIw/_DxlbRSFkTQ/s1600/mcqs-electrical-circuits.jpg" title="MCQs on Electrical Circuits" /></a></td></tr> <tr><td class="tr-caption" style="text-align: center;">Engineering Reviewer - Electrical Circuits</td></tr> </tbody></table> <b>Multiple Choice Questions / Practice Test</b><br /> <b>Electrical Circuits</b><br /> <br /> 1. Conventional flow assumes charges flow from<br /> A. Positive to negative<br /> B. Positive to positive<br /> C. Negative to positive<br /> D. Negative to negative<br /> <br /> 2. Electron flow assumes charges flow from<br /> A. Negative to positive<br /> B. Negative to negative<br /> C. Positive to negative<br /> D. Positive to positive<br /> <br /> 3. Series resonance occurs when<br /> A. XL = XC<br /> B. XL = R<br /> C. Z = R<br /> D. Both A and C<br /> <br /> 4. The symbol Q refers to<br /> A. Resonance quotient<br /> B. Quality factor<br /> C. Power quotient<br /> D. Qualification test<br /> <br /> 5. The ratio of W/VA in an ac circuit means<br /> A. Power factor<br /> B. Reactive factor<br /> C. Quality factor<br /> D. Load factor<br /> <br /> 6. What is the reciprocal of quality factor?<br /> A. Power factor<br /> B. Reactive factor<br /> C. Dissipation factor<br /> D. 1/Q factor<br /> <br /> 7. In liquids and gases, ionization current results from a flow of<br /> A. Positive or negative ions<br /> B. Free electrons<br /> C. Ions that are lighter in weight than electrons<br /> D. Protons<br /> <br /> 8. VL = VC in a series RLC circuit when<br /> A. The value of the impedance is minimum<br /> B. The power factor is zero<br /> C. The current leads the total voltage by 90˚<br /> D. The total voltage is zero<br /> <br /> 9. At what frequency will an inductor of 5mH have the same reactance as a capacitor of 0.1 μF?<br /> A. 7.12 kHz<br /> B. 7.12 Hz<br /> C. 7.12MHz<br /> D. 7.12 GHz<br /> <br /> 10. Property of an electric circuit that dissipates electric energy<br /> A. Reactance<br /> B. Impedance<br /> C. Resistance<br /> D. Conductance<br /> <br /> 11. What is the other name of relative permittivity?<br /> A. Dielectric strength<br /> B. Potential gradient<br /> C. Breakdown voltage<br /> D. Specific inductance capacity<br /> <br /> 12. In a series RLC circuit<br /> A. The current lags VL by 90˚<br /> B. The current leads VL by 90˚<br /> C. X<span style="font-size: xx-small;">L</span> leads X<span style="font-size: xx-small;">C</span> by 90˚<br /> D. Z = <span style="font-size: xx-small;">J</span>X<span style="font-size: xx-small;">L</span> at resonance<br /> <br /> 13. Resistor with colored bands in the body<br /> A. Wire-wound resistor<br /> B. Carbon-composition resistor<br /> C. Potentiometer<br /> D. Rheostat<br /> <br /> 14. In a resonant circuit, if Q ≥ 10 resonant frequency _______ bandwidth.<br /> A. Bisects<br /> B. Exceeds<br /> C. Is less than<br /> D. Is equal to<br /> <br /> 15. Which of the following conditions is not true for a series RLC circuit at resonance?<br /> A. Z = <span style="font-size: xx-small;">J</span>X<span style="font-size: xx-small;">L</span><br /> B. X<span style="font-size: xx-small;">L</span> = X<span style="font-size: xx-small;">C</span><br /> C. The power factor is one<br /> D. The magnitude of Z is √(R^2 + (X<span style="font-size: xx-small;">L</span>-X<span style="font-size: xx-small;">C</span>)^2)<br /> <br /> 16. The current is ____ times the maximum current at half-power points of a resonance curve.<br /> A. 0.707<br /> B. 1.414<br /> C. 0.5<br /> D. 0.632<br /> <br /> 17. A gang capacitor is a variable capacitor in which capacitance is varied by changing the<br /> A. Dielectric<br /> B. Number of plates<br /> C. Plate area<br /> D. Distance between plates<br /> <br /> 18. In an ac circuit with inductive reactance, the<br /> A. Phase angle of the circuit is always 45˚<br /> B. Voltage across the inductance must be 90˚ out-of-phase with the applied voltage<br /> C. Current through the inductance lags its induced voltage by 90˚<br /> D. Current through the inductance and voltage across it are180˚ out-of-phase<br /> <br /> 19. If three 9 mH inductors are connected in parallel without mutual inductance then the total inductance is<br /> A. 3 mH<br /> B. 9 mH<br /> C. 27 mH<br /> D. 18 mH<br /> <br /> 20. What is the specific resistance of a pure germanium?<br /> A. 55 Ω-cm<br /> B. 55 Ω-m<br /> C. 55 Ω-mm<br /> D. 55 kΩ-m<br /> <br /> 21. Two capacitors of capacitance 9 μF and 18 μF in series will have a total capacitance of<br /> A. 27 μF<br /> B. 162 μF<br /> C. 6 μF<br /> D. 180 μF<br /> <br /> 22. In a series RLC circuit<br /> A. Increasing the frequency decreases the resistance<br /> B. Increasing the frequency increases the resistance<br /> C. Both XL and XC change as frequency changes<br /> D. Impedance will always decrease<br /> <br /> 23. A series RLC circuit has a ______ power factor at its half-power points<br /> A. Unity<br /> B. Leading<br /> C. Lagging<br /> D. Either B or C<br /> <br /> 24. Kirchhoff’s laws (KCL and KVL) are applicable to<br /> A. DC circuits<br /> B. AC circuits<br /> C. DC as well as AC circuits<br /> D. Passive networks alone<br /> <br /> 25. A tank circuit is a<br /> A. Parallel LC circuit<br /> B. Series LC circuit<br /> C. A resonant circuit<br /> D. A non-resonant circuit<br /> <br /> 26. A capacitive load always has a ______ power facto<br /> A. Leading<br /> B. Lagging<br /> C. Zero<br /> D. Unity<br /> <br /> 27. What is the temperature coefficient of the resistance Eureka?<br /> A. Infinity<br /> B. Negative<br /> C. Almost zero<br /> D. Positive<br /> <br /> 28. As applied to a series RLC circuit, bandwidth means<br /> A. The frequency range for maximum power transfer<br /> B. The difference between the highest and lowest frequencies of the oscillator<br /> C. The separation of the half-power points<br /> D. The frequency at which X<span style="font-size: xx-small;">L</span> = X<span style="font-size: xx-small;">C</span><br /> <br /> 29. Which is considered as the effect of a dielectric material?<br /> A. Increasing capacitance<br /> B. Decreasing capacitance<br /> C. Reducing the working voltage<br /> D. Increasing the distance between the plates<br /> <br /> 30. The open-circuit voltage at the terminal of load RL is 60V.  Under the condition of maximum power transfer, the load voltage will be<br /> A. 60 V<br /> B. 15 V<br /> C. 20 V<br /> D. 30 V<br /> <br /> 31. If a capacitor is rated for 200V dc, what is its effective ac working voltage?<br /> A. 50 V<br /> B. 100 V<br /> C. 200 V<br /> D. 400 V<br /> <br /> 32. If resonant frequency is 10 kHz and quality factor is 50, then<br /> A. Bandwidth is 200 Hz<br /> B. XL = is 50,000 Ω<br /> C. R is 50 Ω<br /> D. XC = is 50,000 Ω<br /> <div> <br /></div> 33. Which statement is true?<br /> A. A series resonant circuit is of high impedance<br /> B. A parallel resonant circuit is of low impedance<br /> C. A series resonant circuit is inductive if it operates at a frequency higher than the resonant frequency<br /> D. A parallel resonant circuit is inductive if it operates at a frequency higher than the resonant frequency<br /> <br /> 34. What is considered as the most important value of a sine wave?<br /> A. Effective value<br /> B. Peak value<br /> C. Average value<br /> D.  Instantaneous value<br /> <br /> 35. An ac series circuit is composed of a resistance of 20 Ω, inductive reactance of 40 Ω, and a capacitive reactance of 15 Ω. If a current of 1 ampere is flowing, what is the applied voltage<br /> A. 320 V<br /> B. 32 V<br /> C. 220 V<br /> D. 22 V<br /> <br /> 36. An intermittent and non-symmetrical alternating current like that obtained from the secondary winding of an induction coil<br /> A. Faradic current<br /> B. Transient ac current<br /> C. Inductive current<br /> D. Capacitive current<br /> <br /> 37. The value of temperature coefficient (α) is dependent upon<br /> A. The nature of material and temperature<br /> B. The length of material<br /> C. The cross-sectional area of the material<br /> D. The volume of the material<br /> <br /> 38. At what frequency will the current in a series RLC circuit reach its maximum value for an applied voltage of 15 V with R = 500 Ω, L = 100 μH and C = 0.001 μF?<br /> A. 503 kHz<br /> B. 403 kHz<br /> C. 603 kHz<br /> D. 303 kHz<br /> <br /> 39. If two equal resistances connected in series across a certain supply are now connected in parallel across the same supply, the power produced will be _____ that of series connection<br /> A. One-half<br /> B. One-fourth<br /> C. Two times<br /> D. Four times<br /> <div> <br /></div> <div> 40. The voltage lags the current by π/2 cycle in a</div> <div> <div> A. Purely resistive circuit</div> <div> B. Purely inductive circuit</div> <div> C. Purely capacitive circuit</div> <div> D. Circuit containing resistance, capacitance and inductance</div> </div> <div> <br /></div> <div> <div> 41. What is the half-power bandwidth of a parallel resonant circuit which has a resonant frequency of 3.6 MHz and Q of 218?</div> <div> A. 1.65 kHz</div> <div> B. 16.5 MHz</div> <div> C. 16.5 kHz</div> <div> D. 165 kHz</div> <div> <br /></div> <div> 42. Which one of the following elements serves as a protection against overload?</div> <div> A. Fuse</div> <div> B. Switch</div> <div> C. Resistor</div> <div> D. Relay</div> <div> <br /></div> <div> 43. Transient period is considered over after</div> <div> A. 5 τ</div> <div> B. 1 τ</div> <div> C. 100 τ</div> <div> D. 6 τ</div> <div> <br /></div> <div> 44. What rating of a resistor determines its ability to absorb heat?</div> <div> A. Wattage</div> <div> B. Ohmic</div> <div> C. Current</div> <div> D. Voltage</div> <div> <br /></div> <div> 45. An open inductor has</div> <div> A. Zero resistance and infinite inductance</div> <div> B. Infinite resistance and zero inductance</div> <div> C. Infinite resistance and infinite inductance</div> <div> D. Zero resistance and zero inductance</div> <div> <br /></div> <div> 46. What is the reading of an ohmmeter for a shorted capacitor?</div> <div> A. Zero</div> <div> B. Infinity</div> <div> C. k Ω</div> <div> D. M Ω</div> <div> <br /></div> <div> 47. What capacitance exists not through design but simply because two conducting surfaces are relatively close to each other?</div> <div> A. Surge</div> <div> B. Stray</div> <div> C. Natural</div> <div> D. Normal</div> <div> <br /></div> <div> 48. The average value of a triangular or sawtooth wave is _____ times its peak value.</div> <div> A. 0.577</div> <div> B. 0.500</div> <div> C. 0.318</div> <div> D. 0.637</div> <div> <br /></div> <div> 49. A series RLC circuit consists of a 10 Ω resistor in series with L = 10 μH, and C = 100 μF. Determine a new value of I, for which the resonant frequency is one –half the original value.</div> <div> A. 40 μH</div> <div> B. 40 mH</div> <div> C. 40 pH</div> <div> D. 40 nH</div> <div> <br /></div> <div> 50. What is the peak factor of a triangular wave?</div> <div> A. 1.16</div> <div> B. 1.73</div> <div> C. 1.41</div> <div> D. 1.11</div> </div> <div> <br /> <br /> Click the download button below to download this practice set <i>with answers</i> in PDF format.<br /> <a href="http://sh.st/g0beg" target="_blank"><img alt="Engineering Reviewer" border="0" src="http://2.bp.blogspot.com/-_PFABbawQHQ/VA0kf6_YvjI/AAAAAAAAAZI/9qzE0TiS5Qs/s1600/dl.png" /></a></div>

MCQs / Engineering Reviewer - Electrical Circuits Part 1

Engineering Reviewer - Electrical Circuits Multiple Choice Questions / Practice Test Electrical Circuits 1. Conventional flow assumes...

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ECE Board Exam Reviewer Set 6

<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://3.bp.blogspot.com/-fYmpHl3BglU/VQumANlMPTI/AAAAAAAABIs/SW9TKMJ7TZ4/s1600/mcqs-ECE.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="ECE Board Exam Reviewer" border="0" src="http://3.bp.blogspot.com/-fYmpHl3BglU/VQumANlMPTI/AAAAAAAABIs/SW9TKMJ7TZ4/s1600/mcqs-ECE.jpg" title="ECE Board Exam Reviewer" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;"><span style="font-size: 12.8000001907349px;">ECE Board Exam Reviewer</span></td></tr> </tbody></table> <div class="separator" style="clear: both; text-align: center;"> </div> <div class="separator" style="clear: both; text-align: center;"> </div> <b>Multiple Choice Questions</b><br /> <b>ECE Board Exam Reviewer</b><br /> <b><br /></b> 51. ECE Board Exam November 1996<br /> Find the Thevenins impedance equivalent across R2 of a linear close circuit having 10 volt supply in series with two resistors (R1= 50 ohms and R2= 200 ohms).<br /> A. 400 ohms<br /> B. 40 ohms<br /> C. 4 ohms<br /> D. 4 k-ohms<br /> <br /> 52. ECE Board Exam November 1996<br /> What is the process of converting multiple analog input signals sequentially to digital output?<br /> A. Time division multiplexing<br /> B. Analog to digital conversion<br /> C. Space division multiplexing<br /> D. Pulse code multiplexing<br /> <br /> 53. ECE Board Exam November 1996<br /> What is the equivalent of decimal 15 in octal?<br /> A. 15<br /> B. 18<br /> C. 17<br /> D. 16<br /> <br /> 54. ECE Board Exam November 1996<br /> ________ is the transistor which fabricated as two complementary SCRs in parallel with common gate terminal.<br /> A. Triac<br /> B. Field effect transistor<br /> C. Bilateral SCR<br /> D. Unijunction transistor<br /> <br /> 55. ECE Board Exam November 1996<br /> How many diodes will you use to have a basic half-wave rectifier?<br /> A. Three<br /> B. Four<br /> C. Two<br /> D. One <br /> <br /> 56. ECE Board Exam November 1996<br /> Electric charge of neutron is the same as<br /> A. proton<br /> B. electron<br /> C. current<br /> D. atom<br /> <br /> 57. ECE Board Exam November 1996<br /> The current of an electric circuit is analogous to _________ parameter of a magnetic circuit.<br /> A. flux density<br /> B. reluctivity<br /> C. mmf<br /> D. flux<br /> <br /> 58. ECE Board Exam November 1996<br /> Find the filter capacitor that will provide 2.5 % ripple filtered voltage having a load of 120 mA, full wave rectified voltage of 36 V dc and 60 Hz supply.<br /> A. 3117 microfarads<br /> B. 3207 microfarads<br /> C. 311.7 microfarads<br /> D. 320.7 microfarads<br /> <br /> 59. ECE Board Exam November 1996<br /> Which of the following solid state devices work on the phenomenon avalanche breakdown?<br /> A. Triac<br /> B. Unijunction<br /> C. All of the above<br /> D. Light activated SCR<br /> <br /> 60. ECE Board Exam November 1996<br /> _______ is unipolar semiconductor device which the current is carried by the majority carriers only.<br /> A. Field-effect transistor<br /> B. Point-contact transistor<br /> C. Zener diode<br /> D. Junction transistor<br /> <br /> 61. ECE Board Exam November 1996<br /> _________ is a gate which has 2 or more low input signals to get low output.<br /> A. AND<br /> B. Inverter<br /> C. OR<br /> D. NAND<br /> <br /> 62. ECE Board Exam November 1996<br /> The main reason for the variation of amplifier gain with frequency is<br /> A. due to interstage transformer<br /> B. the presence of capacitance both external and internal<br /> C. the logarithmic increases in its output<br /> D. the Miller effect<br /> <br /> 63. ECE Board Exam November 1996<br /> Component of solar battery which uses light energy to produce electromagnetic force<br /> A. Alkaline cells<br /> B. Polymer cells<br /> C. Lithium cells<br /> D. Selenium cells<br /> <br /> 64. ECE Board Exam November 1996<br /> What is the term called magnetic field?<br /> A. The force between the plates of a charged capacitor<br /> B. A force set up when current flows through a conductor<br /> C. Current flow through space around a permanent magnet<br /> D. The force that drives current through a resistor<br /> <br /> 65. ECE Board Exam November 1996<br /> Find the voltage drop developed across D’Arsonval meter movement having an internal resistance of 1 k-ohm and full deflection current of 150 micro amp.<br /> A. 150 kV<br /> B. 150 mV<br /> C. 150 V<br /> D. 150 micro V<br /> <br /> 66. ECE Board Exam November 1996<br /> Kind of AC-motor, light load high speed or high load low speed<br /> A. Synchronous motor<br /> B. Squirrel cage motor<br /> C. Split phase motor<br /> D. Universal motor<br /> <br /> 67. ECE Board Exam November 1996<br /> One of the following can program bipolar PROMs.<br /> A. Biasing bipolar transistor<br /> B. Blowing fuse<br /> C. Enfusing input<br /> D. Charging a gate<br /> <br /> 68. ECE Board Exam November 1996<br /> In order to maintain same secondary output voltage, a power supply which operate from either 120 V or 240 V ac lines must have primary winding:<br /> A. split exactly 1/3 from one end<br /> B. split exactly 1/4 from one end<br /> C. completely no split<br /> D. split exactly 1/2 from one end<br /> <br /> 69. ECE Board Exam November 1996<br /> What is the counter that follows the binary sequence?<br /> A. Binary counter<br /> B. Simplex counter<br /> C. Shift counter<br /> D. Decimal counter<br /> <br /> 70. ECE Board Exam November 1996<br /> _______ are non-semiconductor devices still used in digital memories.<br /> A. Gates<br /> B. Flip-flops<br /> C. Relay<br /> D. Magnetic cores<br /> <br /> 71. ECE Board Exam November 1996<br /> What is the reference cycle time use in radar, when the signal is transmitted and back to receiver?<br /> A. 10.1 microsec<br /> B. 100.0 microsec<br /> C. 12.4 microsec<br /> D. 24.8 microsec<br /> <br /> 72. ECE Board Exam November 1996<br /> Process in industrial electronics where electrons are emitted from the surface of certain metals when expose to the light is called<br /> A. photonics<br /> B. photosensitive<br /> C. phoovoltaic<br /> D. photoemission<br /> <br /> 73. ECE Board Exam November 1996<br /> A FET can act as an excellent buffer amplifier because<br /> A. it has a low input impedance and high output impedance<br /> B. it has a very high voltage gain and low noise level<br /> C. it has a high input impedance and low output impedance<br /> D. smaller size, longer life and lower efficiency<br /> E. Eddy Currents<br /> <br /> 74. ECE Board Exam November 1996<br /> What is the smallest element of a matter?<br /> A. Neutron<br /> B. Proton<br /> C. Atom<br /> D. Electron<br /> <br /> 75. ECE Board Exam November 1996<br /> Refers to a pulse transmitter-receiver used in radio navigation and secondary surveillance radar to either a reply from transponder is called<br /> A. ILS<br /> B. Interrogator<br /> C. Outer maker<br /> D. Inner maker<br /> <br /> 76. ECE Board Exam November 1996<br /> A triac behaves like two<br /> A. diodes in series<br /> B. resistors and one diode<br /> C. four-layer diodes in parallel<br /> D. inverse parallel connected SCRs with common gate<br /> <br /> 77. ECE Board Exam November 1996<br /> ________is called the flux density produced within, due to its own induced magnetism.<br /> A. Electromagnetic field intensity<br /> B. Magnetic field intensity<br /> C. Intensity of magnetization<br /> D. Electric field intensity<br /> <br /> 78. ECE Board Exam November 1996<br /> The resonant circuit of a tuned-collector transistor oscillator has a resonant frequency of 5 MHz. If the value of capacitance is increased by 50%, calculate the new resonant frequency.<br /> A. 3.33 MHz<br /> B. 11.25 MHz<br /> C. 2.6 MHz<br /> D. 4.08 MHz<br /> <br /> 79. ECE Board Exam November 1996<br /> The ability of a material to conduct magnetic flux through it refers to<br /> A. permittivity<br /> B. permeability<br /> C. reluctivity<br /> D. conductivity<br /> <br /> 80. ECE Board Exam November 1996<br /> ___________ is one factor that does not affect resistance.<br /> A. Cross sectional area<br /> B. Resistivity<br /> C. Mass<br /> D. Length<br /> <br /> 81. ECE Board Exam November 1996<br /> Type of power line frequency meter device utilizing a principle of balancing an indicator needle at center at a scale using magnetic fields (resistive and inductive) opposing each other<br /> A. Magnetic type<br /> B. Resonant type<br /> C. Resistive type<br /> D. Electrodynamic type<br /> <br /> 82. ECE Board Exam November 1996<br /> A measuring device or a meter made, so the pointer rests at the center of its scale zero current.<br /> A. Linear meter<br /> B. Galvanometer<br /> C. Digital meter<br /> D. Non-linear meter<br /> <br /> 83. ECE Board Exam November 1996<br /> Part of the oscilloscope which produces bright spot through collection of electrons<br /> A. Focus control<br /> B. Heater cathode<br /> C. Aquadag coating<br /> D. Grid<br /> <br /> 84. ECE Board Exam November 1996<br /> For a processor that uses 4-bit words, the largest number that can be represented using double precision is<br /> A. 255<br /> B. 15 (decimal)<br /> C. 65,535<br /> D. 127<br /> <br /> 85. ECE Board Exam November 1996<br /> __________ refers to the class of logic circuit containing flip-flops.<br /> A. Combinational<br /> B. Sequential<br /> C. Linear<br /> D. Feedback<br /> <br /> 86. ECE Board Exam November 1996<br /> How does junction diodes rated?<br /> A. Maximum reverse current and PIV<br /> B. Maximum forward current and PIV<br /> C. Maximum forward current and capacitance<br /> D. Maximum reverse current and capacitance<br /> <br /> 87. ECE Board Exam November 1996<br /> What logic circuit is analogous to a single pole mechanical selector switch?<br /> A. Decoder<br /> B. Encoder<br /> C. Multiplexer <br /> D. Exclusive OR<br /> <br /> 88. ECE Board Exam November 1996<br /> What do you call an electronic measuring equipment used in navigation which provides runway direction, distance and height guidance to permit blind landing?<br /> A. DME<br /> B. ODR<br /> C. TACAN<br /> D. ILS<br /> <br /> 89. ECE Board Exam November 1996<br /> An encoder is an MSI (medium-scale-integration) circuit that<br /> A. provides an output code that corresponds to which a set of input line is true<br /> B. provides a storage of a certain number of binary bits<br /> C. selects a given output based on binary input code<br /> D. provides for delivering one of two or more inputs to an output<br /> <br /> 90. ECE Board Exam November 1996<br /> In a high-fidelity system, the pair of filter which separate audio frequency band signals into two separate groups, one of which is fed to the tweeter and the other to the woofer is called<br /> A. matching transformer<br /> B. crossover network<br /> C. equalizer<br /> D. bridge network<br /> <br /> 91. ECE Board Exam November 1996<br /> How long in nautical miles does the radar travel to and from at 12.4 microseconds?<br /> A. 2 miles<br /> B. 1 miles<br /> C. 3 miles<br /> D. 4 miles<br /> <br /> 92. ECE Board Exam November 1996<br /> The ________ the Q of a circuit, the narrower is its bandwidth.<br /> A. lower<br /> B. higher<br /> C. broader<br /> D. selective<br /> <br /> 93. ECE Board Exam November 1996<br /> Data selector is also called<br /> A. encoder<br /> B. decoder<br /> C. multiplexer<br /> D. demultiplexer<br /> <br /> 94. ECE Board Exam November 1996<br /> The code 1011 in BCD is<br /> A. 24<br /> B. letter A<br /> C. 11<br /> D. invalid<br /> <br /> 95. ECE Board Exam November 1996<br /> What is the equivalent of hexadecimal 1A in decimal?<br /> A. 27<br /> B. 26<br /> C. 42<br /> D. 40<br /> <br /> 96. ECE Board Exam November 1996<br /> ________ is the voltage applied in direct current circuit having a power of 36 watts and total resistance of 4 ohms.<br /> A. 6V<br /> B. 9V<br /> C. 24V<br /> D. 12V<br /> <br /> 97. ECE Board Exam November 1996<br /> A two-pole, one phase motor has ____ field poles.<br /> A. 8<br /> B. 2<br /> C. 6<br /> D. 4<br /> <br /> 98. ECE Board Exam November 1996<br /> _______ is a device used to store electrical energy in an electrostatic field?<br /> A. Inductor<br /> B. Battery<br /> C. Transformer<br /> D. Capacitor<br /> <br /> 99. ECE Board Exam November 1996<br /> A memory circuit that has address inputs has how many storage locations?<br /> A. 1024<br /> B. 256<br /> C. 512<br /> D. not determined by sets of input<br /> <br /> 100. ECE Board Exam November 1996<br /> High sensitive DC voltmeter provides accurate reading when measuring _______ circuits.<br /> A. zero resistance<br /> B. low resistance<br /> C. at any resistance<br /> <br /> D. high resistance<br /> <div> <br /></div>

ECE Board Exam Reviewer Set 6

ECE Board Exam Reviewer Multiple Choice Questions ECE Board Exam Reviewer 51. ECE Board Exam November 1996 Find the Thevenins im...

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ECE Board Exam Reviewer Set 5

<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://3.bp.blogspot.com/-fYmpHl3BglU/VQumANlMPTI/AAAAAAAABIs/SW9TKMJ7TZ4/s1600/mcqs-ECE.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="ECE Board Exam Reviewer" border="0" src="http://3.bp.blogspot.com/-fYmpHl3BglU/VQumANlMPTI/AAAAAAAABIs/SW9TKMJ7TZ4/s1600/mcqs-ECE.jpg" title="ECE Board Exam Reviewer" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;"><span style="font-size: 12.8000001907349px;">ECE Board Exam Reviewer</span></td></tr> </tbody></table> <div class="separator" style="clear: both; text-align: center;"> </div> <div class="separator" style="clear: both; text-align: center;"> </div> <b>Multiple Choice Questions</b><br /> <b>ECE Board Exam Reviewer</b><br /> <br /> 1. ECE Board Exam November 1996<br /> What is a medium of communication with a computer where programs are written in mnemonics?<br /> A. Assembly Language<br /> B. High level Language<br /> C. Machine Language<br /> D. Low level Language<br /> <br /> 2. ECE Board Exam November 1996<br /> The arrow in the symbol of a transistor indicates the direction of<br /> A. Electron current in the collector<br /> B. Donor ion current<br /> C. Electron current in the emitter<br /> D. Hole current in the emitter<br /> <br /> 3. ECE Board Exam November 1996<br /> Digital ICs are mostly<br /> A. hybrid<br /> B. thick film<br /> C. thin film<br /> D. monolithic<br /> <br /> 4. ECE Board Exam November 1996<br /> A ___________ is a program which converts instruction written in a source language into machine code which can be read and acted upon by the computer.<br /> A. source code<br /> B. assembler<br /> C. application software<br /> D. compiler<br /> <br /> 5. ECE Board Exam November 1996<br /> What is the total resistance of a two equal valued resistor in series?<br /> A. Twice as one<br /> B. The sum of their reciprocal<br /> C. The difference of both<br /> D. The product of both<br /> <br /> 6. ECE Board Exam November 1996<br /> What two elements widely used in semiconductor devices exhibit both metallic and non-metallic characteristics?<br /> A. Galena and Germanium<br /> B. Silicon and Gold<br /> C. Galena and Bismuth<br /> D. Silicon and Germanium<br /> <br /> 7. ECE Board Exam November 1996<br /> What do you expect when you use the two 20 k-ohms, 1 watt resistor in parallel instead of one 10 k-ohms, 1 watt?<br /> A. Provide more power<br /> B. Provide lighter current<br /> C. Provide less power<br /> D. Provide wider tolerance<br /> <br /> 8. ECE Board Exam November 1996<br /> Find the required battery capacity needed to operate an equipment of 30 Amperes at 5 hours.<br /> A. 6<br /> B. 30<br /> C. 3<br /> D. 150<br /> <br /> 9. ECE Board Exam November 1996<br /> What does ALU which carries arithmetic and logic operations process?<br /> A. Binary coded decimal numbers<br /> B. Hexadecimal numbers<br /> C. Octal numbers<br /> D. Binary numbers<br /> <br /> 10. ECE Board Exam November 1996<br /> A static memory will store information<br /> A. as long as power is applied to the memory<br /> B. even when power is not applied to the memory<br /> C. as long as power is applied and the memory is refreshed periodically<br /> D. when power is applied at regular intervals<br /> <br /> 11. ECE Board Exam November 1996<br /> The conductance of a circuit having three (3) 10 ohms resistors in parallel is<br /> A. 3.33 S<br /> B. 0.30 S<br /> C. 0.333 S<br /> D. 30 S<br /> <br /> 12. ECE Board Exam November 1996<br /> Protons are about _______ heavier than electrons.<br /> A. 1,800 times<br /> B. less than thrice<br /> C. less<br /> D. twice<br /> <br /> 13. ECE Board Exam November 1996<br /> In half-wave rectifier, if a resistance equal to load resistance is connected in parallel with the diode then<br /> A. circuit will stop rectifying<br /> B. output voltage would be halved<br /> C. output voltage would be doubled<br /> D. output voltage will remain unchanged<br /> <br /> 14. ECE Board Exam November 1996<br /> ______ refers to a function of a decade counter digital IC.<br /> A. Producing one output pulse for every 10 input pulses<br /> B. Adding two decimal numbers<br /> C. Producing 10 output pulses for every input pulse<br /> D. Decoding a decimal number for display on seven segment<br /> <br /> 15. ECE Board Exam November 1996<br /> What is the time interval to undertake a refresh operation in a typical dynamic RAM?<br /> A. 2 ms<br /> B. 200 ns<br /> C. 50 µs<br /> D. 22 µs<br /> <br /> 16. ECE Board Exam November 1996<br /> Electric energy refers to _________.<br /> A. Joules divided by time<br /> B. Volt-coulomb<br /> C. Volt-ampere<br /> D. Watt<br /> <br /> 17. ECE Board Exam November 1996<br /> What is the process by which AC is converted to pulsating DC?<br /> A. Charging<br /> B. Rectification<br /> C. Filtering<br /> D. Clipping<br /> <br /> 18. ECE Board Exam November 1996<br /> _______ frequency is reached when the capacitive and inductive reactance in a tuned circuit are equal.<br /> A. Infinite<br /> B. Resonant<br /> C. Pulsating<br /> D. Zero<br /> <br /> 19. ECE Board Exam November 1996<br /> A ______ is composed of voltage-controlled oscillator, a phase comparator and a low pass filter, where the oscillator generates the output frequency in response to an error voltage produced by the comparator.<br /> A. JK flip-flop<br /> B. error detection<br /> C. voltage-to-frequency converter<br /> D. phase-locked loop<br /> <br /> 20. ECE Board Exam November 1996<br /> How are the networks able to transform one impedance to another?<br /> A. Resistance in the networks substitute for resistances in the load<br /> B. The matching network can cancel the reactive part of an impedance and change the value of the resistive part of an impedance<br /> C. The matching network introduces negative resistance to cancel the resistive part of an impedance<br /> D. The matching network introduces transconductance to cancel the reactive part of an impedance<br /> <br /> 21. ECE Board Exam November 1996<br /> Which of the following demodulates an RF modulated wave?<br /> A. RF amp<br /> B. IF amp<br /> C. Mixer<br /> D. Detector<br /> <br /> 22. ECE Board Exam November 1996<br /> The ideal internal resistance of an ammeter should be<br /> A. equal to the circuit’s resistance<br /> B. zero<br /> C. infinity<br /> D. higher than the circuit’s resistance<br /> <br /> 23. ECE Board Exam November 1996<br /> What type of bias is required for an LED to produce luminescence?<br /> A. Reverse bias<br /> B. Zero bias<br /> C. Forward bias<br /> D. Inductive bias<br /> <br /> 24. ECE Board Exam November 1996<br /> What is the resonant frequency of a circuit when L of 2 microhenrys and C of 30 picofarads are in series?<br /> A. 20.5 kHz<br /> B. 20.5 MHz<br /> C. 2.65 kHz<br /> D. 2.65 MHz<br /> <br /> 25. ECE Board Exam November 1996<br /> _________ is a layer of insulating medium that separates the plates of a capacitor.<br /> A. Insulator<br /> B. Core<br /> C. Dielectric<br /> D. Space<br /> <br /> 26. ECE Board Exam November 1996<br /> What is the oscillator of a radar receiver?<br /> A. Detector<br /> B. Product detector<br /> C. Hartley oscillator<br /> D. Klystron oscillator<br /> <br /> 27. ECE Board Exam November 1996<br /> What is the equivalent of decimal number 11 in binary<br /> A. 1101<br /> B. 1110<br /> C. 1111<br /> D. 1011<br /> <br /> 28. ECE Board Exam November 1996<br /> Which of the following ammeters is the most sensitive?<br /> A. 0-100 micro Ammeter<br /> B. 0-5 milli Ammeter<br /> C. micro Ammeter<br /> D. 0-50 milli Ammeter<br /> <br /> 29. ECE Board Exam November 1996<br /> In the concept of induction heating in industrial electronics, the eddy current penetrates to greater depths at<br /> A. high frequencies<br /> B. increasing induction<br /> C. decreasing induction<br /> D. low frequencies<br /> <br /> 30. ECE Board Exam November 1996<br /> Refers to the lowest voltage across any insulator that can cause current flow<br /> A. Conduction voltage<br /> B. Breakdown voltage<br /> C. Voltage flow<br /> D. Voltage drop<br /> <br /> 31. ECE Board Exam November 1996<br /> Type of power-line frequency meter composed of vibrating iron reeds placed in alternating magnetic field<br /> A. Induction type<br /> B. Resonant type<br /> C. Vibrating reed type<br /> D. Electrodynamic type<br /> <br /> 32. ECE Board Exam November 1996<br /> A separately packaged circuit element with its own external connections is called a ______ component.<br /> A. integrated<br /> B. discrete<br /> C. active<br /> D. passive<br /> <br /> 33. ECE Board Exam November 1996<br /> The area of a conductor whose diameter is 0.001 inch is equal to<br /> A. one angstrom<br /> B. one circular mill<br /> C. one micron<br /> D. one steradian<br /> <br /> 34. ECE Board Exam November 1996<br /> ______ is called the time sharing of one line with multiplex signals.<br /> A. Simultaneous transmission<br /> B. Bidirectional<br /> C. Relay<br /> D. Multiplexing<br /> <br /> 35. ECE Board Exam November 1996<br /> A process of constant loses of free electrons and then regaining them is called ______.<br /> A. induction<br /> B. ionization<br /> C. polarization<br /> D. electron gaining<br /> <br /> 36. ECE Board Exam November 1996<br /> Term used for an out-of-phase, non-productive power associated with inductors and capacitors.<br /> A. Reactive power<br /> B. Effective power<br /> C. Peak envelope power<br /> D. True power<br /> <br /> 37. ECE Board Exam November 1996<br /> What do you call the devices that allow computers to communicate with other computers through telephone lines or radio frequency?<br /> A. Modems<br /> B. Disks<br /> C. Mouse<br /> D. Super computers<br /> <br /> 38. ECE Board Exam November 1996<br /> As general rule in the process of industrial electronic heating, the frequency with the thickness of the metal to be heated<br /> A. is not related<br /> B. is directly proportional<br /> C. varies inversely<br /> D. varies<br /> <br /> 39. ECE Board Exam November 1996<br /> A __________ network is a two-port circuit made up of a repeated L, T, pi or H networks.<br /> A. lattice<br /> B. hierarchy<br /> C. hybrid<br /> D. ladder<br /> <br /> 40. ECE Board Exam November 1996<br /> The octal equivalent of binary number 10101100 is<br /> A. 367<br /> B. AC16<br /> C. 254<br /> D. 172<br /> <br /> 41. ECE Board Exam November 1996<br /> Which type of network offers the greater transformation ratio?<br /> A. L-network<br /> B. Pi-network<br /> C. Constant-K<br /> D. Constant-M<br /> <br /> 42. ECE Board Exam November 1996<br /> Refers to the system that has no feedback and is not self-correcting<br /> A. Close-loop system<br /> B. Coal slurry system<br /> C. Feed forward control system<br /> D. Open-loop system<br /> <br /> 43. ECE Board Exam November 1996<br /> Find the equivalent of 10 Oersted (Oe)<br /> A. 100 Gb/cm<br /> B. 1 Gb/cm<br /> C. 10 Gb/cm<br /> D. 1 Gb/m<br /> <br /> 44. ECE Board Exam November 1996<br /> The density of data recorded on magnetic tape is measured in<br /> A. bit stuffing rate<br /> B. bit error rate<br /> C. bits per inch<br /> D. bits per second<br /> <br /> 45. ECE Board Exam November 1996<br /> _______ is called back EMF.<br /> A. A voltage that opposes the applied EMF<br /> B. A current that opposes the applied EMF<br /> C. An opposing EMF equal to R multiplied by C (RC) percent of the applied EMF<br /> D. A current equal to the applied EMF<br /> <br /> 46. ECE Board Exam November 1996<br /> What is the purpose of the rheostat in ohmmeter?<br /> A. Balancing resistance<br /> B. Counter resistance of measured circuit<br /> C. Coil resistance<br /> D. Compensate aging battery of the meter<br /> <br /> 47. ECE Board Exam November 1996<br /> Find the charge in coulombs of dielectric that has a positive charge of 14.5 x 10 to the 18th power protons.<br /> A. 29 x 10 to the 16th coulombs<br /> B. 14.5 x 10 to the 16th coulombs<br /> C. 14.5 x 10 to the 18th coulombs<br /> D. 29 x 10 to the 18th coulombs<br /> E. None of the above<br /> <br /> 48. ECE Board Exam November 1996<br /> _________ is the transmitter receiver triggered by interrogator used mainly in secondary surveillance radar and distance measuring equipment.<br /> A. Transponder<br /> B. ILS<br /> C. Interrogator<br /> D. VOR<br /> <br /> 49. ECE Board Exam November 1996<br /> In electricity, positive electric charge refers to __________.<br /> A. protons<br /> B. neutrons<br /> C. electrons<br /> D. atoms<br /> <br /> 50. ECE Board Exam November 1996<br /> What is the lagging effect between the magnetizing force applied and the flux density?<br /> A. Hysteresis<br /> B. Permeance<br /> C. Eddy current<br /> D. Reluctance<br /> <div> <br /></div>

ECE Board Exam Reviewer Set 5

ECE Board Exam Reviewer Multiple Choice Questions ECE Board Exam Reviewer 1. ECE Board Exam November 1996 What is a medium of co...

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ECE Board Exam Reviewer Set 4

<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://3.bp.blogspot.com/-fYmpHl3BglU/VQumANlMPTI/AAAAAAAABIs/SW9TKMJ7TZ4/s1600/mcqs-ECE.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="ECE Board Exam Reviewer" border="0" src="http://3.bp.blogspot.com/-fYmpHl3BglU/VQumANlMPTI/AAAAAAAABIs/SW9TKMJ7TZ4/s1600/mcqs-ECE.jpg" title="ECE Board Exam Reviewer" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;"><span style="font-size: 12.8000001907349px;">ECE Board Exam Reviewer</span></td></tr> </tbody></table> <div class="separator" style="clear: both; text-align: center;"> </div> <div class="separator" style="clear: both; text-align: center;"> </div> <b>Multiple Choice Questions</b><br /> <b>ECE Board Exam Reviewer</b><br /> <br /> 51. ECE Board Exam March 1996<br /> ________ is called an electronic transfer from one stage to the next.<br /> A. Coupling<br /> B. Swamping<br /> C. Doping<br /> D. Mixing<br /> <br /> 52. ECE Board Exam March 1996<br /> _______ capability is analogous to permeance.<br /> A. Admittance<br /> B. Conductance<br /> C. Reluctance<br /> D. Resistance<br /> <br /> 53. ECE Board Exam March 1996<br /> Which is a common use for point-contact diode?<br /> A. As a constant current source<br /> B. As a constant voltage source<br /> C. As an RF detector<br /> D. As a high voltage rectifier<br /> <br /> 54. ECE Board Exam March 1996<br /> Which of the following is not a secondary type cell?<br /> A. Lithium<br /> B. Lead-acid<br /> C. Silver cadmium<br /> D. Silver-zinc<br /> <br /> 55. ECE Board Exam March 1996<br /> What do you call the piece of equipment in an oscilloscope used to indicate pulse condition in a digital logic circuit?<br /> A. Logic probe<br /> B. Probe<br /> C. Electroscope<br /> D. Galvanometer<br /> <br /> 56. ECE Board Exam March 1996<br /> How many bits, binary pattern represent the decimal numbers 0 to 9 in binary coded decimal?<br /> A. 4<br /> B. 1<br /> C. 2<br /> D. 8<br /> <br /> 57. ECE Board Exam March 1996<br /> Which is the principal characteristic of a varactor diode?<br /> A. It has a very high PIV<br /> B. It has a negative resistance region<br /> C. Its internal capacitance varies with the applied voltage<br /> D. It has a constant voltage under conditions of varying current<br /> <br /> 58. ECE Board Exam March 1996<br /> What is the law whereby the attraction or repulsion between two magnetic poles is directly proportional to their strength?<br /> A. Coulomb’s law<br /> B. Newton’s law<br /> C. Coulomb’s first law<br /> D. Norton’s law<br /> <br /> 59. ECE Board Exam March 1996<br /> Efficient oscillators are those that are class ________.<br /> A. AB<br /> B. B<br /> C. C<br /> D. A<br /> <br /> 60. ECE Board Exam March 1996<br /> _______ refers to a circuit that stores pulses and produces an output pulse when specified number of pulses is stored.<br /> A. Counter<br /> B. Register<br /> C. Flip-flop<br /> D. Buffer<br /> <br /> 61. ECE Board Exam March 1996<br /> How many lithium cells in series are needed for a 12 V battery?<br /> A. 12 cells<br /> B. 4 cells<br /> C. 8 cells<br /> D. 10 cells<br /> <br /> 62. ECE Board Exam March 1996<br /> _________ is a linear electronic voltage regulator<br /> A. A regulator that has a ramp voltage at its output<br /> B. A regulator in which the control device is switched on or off, with the duty cycle proportional to the line or load conditions<br /> C. A regulator in which the pass transistor switches from the “off” state to the “on” state<br /> D. A regulator in which the conduction of a control element is varied in direct proportion to the voltage or load current.<br /> <br /> 63. ECE Board Exam March 1996<br /> The particles that make up the lattice in ionic crystal<br /> A. Molecules<br /> B. Ions<br /> C. Electrons<br /> D. Neutron<br /> <br /> 64. ECE Board Exam March 1996<br /> Parallel cells have the same voltage as one cell but have _______.<br /> A. unstable resistance<br /> B. less current capacity<br /> C. fluctuating power output<br /> D. more current capacity<br /> <br /> 65. ECE Board Exam March 1996<br /> A digital word consisting of only four bits is called a<br /> A. dibit<br /> B. quad<br /> C. pixel<br /> D. nibble<br /> <br /> 66. ECE Board Exam March 1996<br /> The reason for the thin layer of varnish over the copper coil pattern is to prevent<br /> A. oxidizing<br /> B. flux<br /> C. corrosion<br /> D. dioxide<br /> <br /> 67. ECE Board Exam March 1996<br /> _________ is the output voltage of a carbon-zinc cell.<br /> A. 3.5 V<br /> B. 2.5 V<br /> C. 1.5 V<br /> D. 0.5 V<br /> <br /> 68. ECE Board Exam March 1996<br /> Speed of a logic circuit is normally expressed as ________<br /> A. logic levels<br /> B. speed immunity<br /> C. propagation delay<br /> D. power consumption<br /> <br /> 69. ECE Board Exam March 1996<br /> _______ is the term used to express the ratio of the change in the dc collector current to a change in base current in a bipolar transistor.<br /> A. Gamma<br /> B. Beta<br /> C. Alpha<br /> D. Delta<br /> <br /> 70. ECE Board Exam March 1996<br /> _______ refers to a program that translates and then immediately executes statements in a high level language.<br /> A. Interpreter<br /> B. Synchronous<br /> C. Interface<br /> D. Operating system<br /> <br /> 71. ECE Board Exam March 1996<br /> __________ is the property of magnetic materials which retain magnetism after magnetizing force is withdrawn.<br /> A. Reluctivity<br /> B. Resistivity<br /> C. Retentivity<br /> D. Conductivity<br /> <br /> 72. ECE Board Exam March 1996<br /> A ________ is a junction field effect transistor with a Schottky barrier instead of a normal semiconductor junction.<br /> A. biFET<br /> B. MOSFET<br /> C. MESFET<br /> D. JUGFET<br /> <br /> 73. ECE Board Exam March 1996<br /> Term used for response in an electrical circuit.<br /> A. The frequency at which power factor is at a minimum<br /> B. The highest frequency that will pass current<br /> C. The frequency at which capacitive reactance equals inductive reactance<br /> D. The lowest frequency that will pass current<br /> <br /> 74. ECE Board Exam March 1996<br /> _________ is the progressive decay with time in the amplitude of the free oscillation in a circuit.<br /> A. Decrement<br /> B. Pulse decay time<br /> C. Damping<br /> D. Dancing<br /> <br /> 75. ECE Board Exam March 1996<br /> What do you call a circuit that changes pure binary code into ASCII?<br /> A. Decoder<br /> B. Encoder<br /> C. Demultiplexer<br /> D. Code converter<br /> <br /> 76. ECE Board Exam March 1996<br /> Which of the following statement is incorrect?<br /> A. Open transistor has three (3) terminals<br /> B. Transistors have three (3) terminals<br /> C. Potentiometer has three (3) terminals<br /> D. Typical power rating of carbon-composition resistors ranged from 0.001 W to 0.1 W<br /> <br /> 77. ECE Board Exam March 1996<br /> Which statement is not true?<br /> A. The internal resistance of a cell limits the amount of output current<br /> B. Two electrodes of the same metal provide the highest voltage output<br /> C. Secondary cell can be recharged<br /> D. The negative terminal of a chemical cell has a charge of excess electrons<br /> <br /> 78. ECE Board Exam March 1996<br /> What type of circuit whose parameters are constant which do not change with voltage of current?<br /> A. Lumped circuit<br /> B. Tuned circuit<br /> C. Reactive circuit<br /> D. Linear circuit<br /> <br /> 79. ECE Board Exam March 1996<br /> __________ is gaseous tube which uses a pool of liquid mercury as its cathode.<br /> A. Thyratron<br /> B. Phanotron<br /> C. Klystron<br /> D. Ignition<br /> <br /> 80. ECE Board Exam March 1996<br /> What do you call an electromagnet with its core in a form of magnetic ring?<br /> A. Polarization<br /> B. Irradiation<br /> C. Toroid<br /> D. Doping<br /> <br /> 81. ECE Board Exam March 1996<br /> _________ is the procedure by which an atom is given a net charge by adding or taking away of electron.<br /> A. Polarization<br /> B. Irradiation<br /> C. Ionization<br /> D. Doping<br /> <br /> 82. ECE Board Exam March 1996<br /> What do you call an electronic component that is a non-linear resistor and its resistance is function of the voltage across it?<br /> A. Triac<br /> B. IC<br /> C. Varistor<br /> D. Thyristor<br /> <br /> 83. ECE Board Exam March 1996<br /> Find the half-power bandwidth of a resonant circuit which has a resonant frequency of 1.8 MHz and a Q of 95.<br /> A. 189 Hz<br /> B. 1.89 kHz<br /> C. 58.7 kHz<br /> D. 18.9 kHz<br /> <br /> 84. ECE Board Exam March 1996<br /> A dynamic memory will store information<br /> A. as long as power is applied to the memory<br /> B. as long as power is applied and the memory is refreshed periodically<br /> C. even when power is not applied to the memory<br /> D. when power is applied at regular intervals<br /> <br /> 85. ECE Board Exam March 1996<br /> The energy of an oscillator can be source by _________<br /> A. coupling a small coil close to the tube<br /> B. capacitance of inductive coupling from tuned circuit<br /> C. inserting resistor in the grid circuit<br /> D. connecting capacitor across the supply<br /> <br /> 86. ECE Board Exam March 1996<br /> Refers to that part of computer that interprets and executes instructions<br /> A. ACC<br /> B. ALU<br /> C. CPU<br /> D. Compiler<br /> <br /> 87. ECE Board Exam March 1996<br /> What is the gain of a vacuum tube having the following parameter amplification factor is 80, external plate-load resistance of 30,000 ohms and the tubes internal plate resistance is 10,000 ohms?<br /> A. 60<br /> B. 20<br /> C. 30<br /> D. 40<br /> <br /> 88. ECE Board Exam March 1996<br /> __________is the region in a transistor that is heavily doped<br /> A. Collector<br /> B. Ground<br /> C. Base<br /> D. Emitter<br /> <br /> 89. ECE Board Exam March 1996<br /> Which class of amplifier has the highest linearity and least distortion<br /> A. Class A<br /> B. Class AB<br /> C. Class C<br /> D. Class B<br /> <br /> 90. ECE Board Exam March 1996<br /> _________ is the unit of reluctance.<br /> A. Gauss<br /> B. Weber<br /> C. Maxwells<br /> D. At/Wb<br /> <br /> 91. ECE Board Exam March 1996<br /> Find the value of voltage regulation having a dc voltage of 67 V without load and with full load current drawn the output voltage drops to 42 V.<br /> A. 59.5 %<br /> B. 15.9 %<br /> C. 62.6 %<br /> D. 32.5 %<br /> <br /> 92. ECE Board Exam March 1996<br /> What is the reason why more cells can be stored in a given area with dynamic cells?<br /> A. They consume less power<br /> B. They are smaller<br /> C. They are larger<br /> D. They travel faster<br /> <br /> 93. ECE Board Exam March 1996<br /> Which of the following is a characteristic of cascaded amplifier?<br /> A. Double each amplifier’s gain<br /> B. Each amplifiers gain is increased<br /> C. Increased overall gain<br /> D. Total gain is decreased<br /> <br /> 94. ECE Board Exam March 1996<br /> How do you determine if diode is defective?<br /> A. Diode resistance is either very low or very high on either direction<br /> B. High current<br /> C. Very low current<br /> D. High voltage<br /> <br /> 95. ECE Board Exam March 1996<br /> Avalanche breakdown is primarily dependent on the phenomenon of<br /> A. doping<br /> B. collision<br /> C. recombination<br /> D. ionization<br /> <br /> 96. ECE Board Exam March 1996<br /> What network facility is used to interconnect distinct networks physically?<br /> A. Relays<br /> B. Routers<br /> C. Repeaters<br /> D. Bridges<br /> <br /> 97. ECE Board Exam March 1996<br /> Diagram showing procedures which are followed and actions taken is called<br /> A. functional block diagram<br /> B. circuit diagram<br /> C. flow chart<br /> D. schematic diagram<br /> <br /> 98. ECE Board Exam March 1996<br /> Find the dielectric constant of air<br /> A. Approximately 1<br /> B. Approximately 0<br /> C. Approximately 2<br /> D. Approximately 4<br /> <br /> 99. ECE Board Exam March 1996<br /> __________ refers to the term remote sensing with regard to a linear voltage regulator.<br /> A. The feedback connection to the error amplifier is made directly to the load<br /> B. The load connection is made outside the feedback loop<br /> C. The error amplifier compares the input voltage to the reference voltage<br /> D. Sensing is accomplished by wireless inductive loops<br /> <br /> 100. ECE Board Exam March 1996<br /> Transition region refers to ________ with regard to transistor.<br /> A. the area of maximum N-type charge<br /> B. the area maximum P-type<br /> C. the point where wire leads are connected to the P or N type material<br /> D. an area of low charge density around P-N junction<br /> <div> <br /></div>

ECE Board Exam Reviewer Set 4

ECE Board Exam Reviewer Multiple Choice Questions ECE Board Exam Reviewer 51. ECE Board Exam March 1996 ________ is called an el...

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ECE Board Exam Reviewer Set 3

<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://3.bp.blogspot.com/-fYmpHl3BglU/VQumANlMPTI/AAAAAAAABIs/SW9TKMJ7TZ4/s1600/mcqs-ECE.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="ECE Board Exam Reviewer" border="0" src="http://3.bp.blogspot.com/-fYmpHl3BglU/VQumANlMPTI/AAAAAAAABIs/SW9TKMJ7TZ4/s1600/mcqs-ECE.jpg" title="ECE Board Exam Reviewer" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;"><span style="font-size: 12.8000001907349px;">ECE Board Exam Reviewer</span></td></tr> </tbody></table> <div class="separator" style="clear: both; text-align: center;"> </div> <div class="separator" style="clear: both; text-align: center;"> </div> <b>Multiple Choice Questions</b><br /> <b>ECE Board Exam Reviewer</b><br /> <br /> 1. ECE Board Exam March 1996<br /> What is a group of circuits that provides timing and signals to all operation in the computer?<br /> A. Output unit<br /> B. Memory unit<br /> C. Control unit<br /> D. Input unit<br /> <br /> 2. ECE Board Exam March 1996<br /> Where does voltage generated in a DC generator depend?<br /> A. Field resistance and flux<br /> B. Field and armature currents<br /> C. Flux and speed<br /> D. Speed and field resistance<br /> <br /> 3. ECE Board Exam March 1996<br /> __________ is the most influential factor in the switching speed of saturated bipolar transistor<br /> A. Charge stored<br /> B. Collector current<br /> C. HFE<br /> D. Base current<br /> <br /> 4. ECE Board Exam March 1996<br /> What is a pi-network?<br /> A. A Power Incidence Network<br /> B. A network consisting of one inductor and two capacitors or two inductors and one capacitor<br /> C. A network consisting entirely of four inductors or four capacitors<br /> D. An antenna matching network that is isolated form ground<br /> <br /> 5. ECE Board Exam March 1996<br /> __________ is the property of a material which opposes creation of magnetic flux?<br /> A. Resistance<br /> B. Permeance<br /> C. Reluctance<br /> D. Conductance<br /> <br /> 6. ECE Board Exam March 1996<br /> The purpose of cells connected in parallel is to<br /> A. increase internal resistance<br /> B. increase voltage output<br /> C. decrease current capacity<br /> D. increase current capacity<br /> <br /> 7. ECE Board Exam March 1996<br /> What does SI magnetic flux refer?<br /> A. Weber<br /> B. Flux<br /> C. Maxwell<br /> D. Lines<br /> <br /> 8. ECE Board Exam March 1996<br /> __________ is a type of linear regulator used in applications requiring efficient utilization of the primary power source.<br /> A. A series regulator<br /> B. A shunt regulator<br /> C. A constant current source<br /> D. A shunt current source<br /> <br /> 9. ECE Board Exam March 1996<br /> When a switch is closed, it has a total resistance of<br /> A. 1000 ohms at room temperature<br /> B. unstable<br /> C. infinity<br /> D. zero<br /> <br /> 10. ECE Board Exam March 1996<br /> How many turns are needed to produce a magnetizing force of 5000 A.t. for a coil of 50 amperes?<br /> A. 1,000 turns<br /> B. 5,000 turns<br /> C. 100 turns<br /> D. 500 turns<br /> <br /> 11. ECE Board Exam March 1996<br /> When an SCR is triggered or on condition, its electrical characteristics are similar to what other solid-state device (as measured between its cathode and anode)?<br /> A. The junction diode<br /> B. The varactor diode<br /> C. The tunnel diode<br /> D. The hot-carrier diode<br /> <br /> 12. ECE Board Exam March 1996<br /> What special type of diode is capable of both amplification and oscillation?<br /> A. Point contact diode<br /> B. Junction diode<br /> C. Zener diode<br /> D. Tunnel diode<br /> <br /> 13. ECE Board Exam March 1996<br /> A static memory generally contains<br /> A. electrons<br /> B. positive ions<br /> C. row decoders<br /> D. holes<br /> <br /> 14. ECE Board Exam March 1996<br /> Which is the majority carrier in an N-type semiconductor?<br /> A. Electrons<br /> B. Positive ions<br /> C. Negative ions<br /> D. Holes<br /> <br /> 15. ECE Board Exam March 1996<br /> Steel is hard to magnetize because of its _______.<br /> A. high retentivity<br /> B. low permeability<br /> C. high permeability<br /> D. high density<br /> <br /> 16. ECE Board Exam March 1996<br /> When you increase the resistance in a circuit, the flows of electrons will ______<br /> A. flow faster<br /> B. be constant<br /> C. be decreased<br /> D. be stopped<br /> <br /> 17. ECE Board Exam March 1996<br /> Current in a chemical cell refers to the movement of ________<br /> A. negative ions only<br /> B. negative and positive ions<br /> C. positive ions only<br /> D. negative hole charge<br /> <br /> 18. ECE Board Exam March 1996<br /> What is the effect of light in a photodiode?<br /> A. Reverse current<br /> B. Limits flow of current<br /> C. Forwards current<br /> D. Renders unstable current<br /> <br /> 19. ECE Board Exam March 1996<br /> What is the effect in terms of bandwidth when the Q of a single-tune stage is doubled?<br /> A. Doubled<br /> B. The same<br /> C. Halved<br /> D. Four times<br /> <br /> 20. ECE Board Exam March 1996<br /> ___________ is the dc motor control senses.<br /> A. Resistance<br /> B. Counter emf<br /> C. Field voltage<br /> D. Armature current<br /> <br /> 21. ECE Board Exam March 1996<br /> What is the range of voltage rating available in zener diodes?<br /> A. 2.4 volts to 200 volts<br /> B. 1.2 volts to 7 volts<br /> C. 3 volts to 2000 volts<br /> D. 1.2 volts to 5.6 volts<br /> <br /> 22. ECE Board Exam March 1996<br /> Find which type of network provides the greatest harmonic suppression.<br /> A. Pi-network<br /> B. Pi-L-network<br /> C. Inverse-Pi-network<br /> D. L-network<br /> <br /> 23. ECE Board Exam March 1996<br /> What type of transformer that is used to protect technicians and operators from deadly electrical shock?<br /> A. Absorber transformer<br /> B. Step-down transformer<br /> C. Step-up transformer<br /> D. Isolation transformer<br /> <br /> 24. ECE Board Exam March 1996<br /> What is residual magnetism?<br /> A. The external magnetic field when the current is flowing through the exciting coil.<br /> B. The flux density, which exist in the iron core when the magnetic field intensity is reduced to zero.<br /> C. The flux density, which exist in the iron core when the magnetic field intensity is at its maximum value.<br /> D. The flux density when the magnetic core is saturated.<br /> <br /> 25. ECE Board Exam March 1996<br /> When batteries have cells connected in series the effect is<br /> A. reduced output voltage<br /> B. increased current supply<br /> C. increased voltage supply<br /> D. reduced internal resistance<br /> <br /> 26. ECE Board Exam March 1996<br /> How many OP-AMPS does window comparator require?<br /> A. 2<br /> B. 4<br /> C. 3<br /> D. 1<br /> <br /> 27. ECE Board Exam March 1996<br /> What is the memory element used in clocked sequential logic circuit?<br /> A. Gates<br /> B. Flip-flop<br /> C. Static-RAM<br /> D. Read-only memory<br /> <br /> 28. ECE Board Exam March 1996<br /> Semiconductors which are considered to be “low power” or “small signal” usually have power dissipation ratings of<br /> A. 1 watt or less<br /> B. 5 watts or less<br /> C. exactly 1 watt<br /> D. 10 watt or less<br /> <br /> 29. ECE Board Exam March 1996<br /> ________ for a transistor to be cut-off<br /> A. Maximum current flows from emitter to collector<br /> B. The transistor is at its operating point<br /> C. No current flows from emitter to collector<br /> D. There is no base current<br /> <br /> 30. ECE Board Exam March 1996<br /> A __________ is an instruction in a source language that is to be replaced by a defined sequence of instructions in the same source language<br /> A. statement<br /> B. source code<br /> C. mnemonic<br /> D. macro-instruction<br /> <br /> 31. ECE Board Exam March 1996<br /> Common-base (CB) amplifier has ______ compared to common-emitter and common collector amplifiers.<br /> A. a higher input resistance<br /> B. a larger current gain<br /> C. a lower input resistance<br /> D. a larger voltage gain<br /> <br /> 32. ECE Board Exam March 1996<br /> _________ currents are wasteful currents which flow in cores of transformers and produces heat.<br /> A. Residual<br /> B. Eddy<br /> C. Sneak<br /> D. Magnetizing<br /> <br /> 33. ECE Board Exam March 1996<br /> Which of the following photocell is most sensitive to?<br /> A. Radio waves<br /> B. Sound waves<br /> C. Light waves<br /> D. Heat waves<br /> <br /> 34. ECE Board Exam March 1996<br /> What is the resonant frequency of a circuit when L of 1 microhenry and C of 10 picofarads are in series?<br /> A. 15.9 MHz<br /> B. 50.3 MHz<br /> C. 15.9 MHz<br /> D. 50.3 kHz<br /> <br /> 35. ECE Board Exam March 1996<br /> What is the law that determines polarity of an induced voltage?<br /> A. Norton’s Law<br /> B. Thevenin’s Law<br /> C. Lenz Law<br /> D. Faraday’s Law<br /> <br /> 36. ECE Board Exam March 1996<br /> The science of physical phenomena at very low temperatures, approaching absolute zero is called ____________<br /> A. Crytanalysis<br /> B. Cybernetics<br /> C. Temperature inversion<br /> D. Cryogenics<br /> <br /> 37. ECE Board Exam March 1996<br /> If a dry cell has an internal resistance of 0.50 ohm and an emf of 2 volts, find power delivered in a one ohm resistor?<br /> A. 1.33 watts<br /> B. 1.66 watts<br /> C. 3.66 watts<br /> D. 1.77 watts<br /> <br /> 38. ECE Board Exam March 1996<br /> What happens in the resistance of copper wired when its temperature is raised?<br /> A. Decreased<br /> B. Steady<br /> C. Increase<br /> D. Zero<br /> <br /> 39. ECE Board Exam March 1996<br /> Refers to the part of computer that performs mathematical operations<br /> A. CPU<br /> B. Flip-flop<br /> C. Assembly Language<br /> D. ALU<br /> <br /> 40. ECE Board Exam March 1996<br /> ________ is called a memory device which holds fixed set of data in a circuit.<br /> A. RAM<br /> B. Register<br /> C. Logic<br /> D. ROM<br /> <br /> 41. ECE Board Exam March 1996<br /> When a voltage of 100 V at 50 Hz is applied to a choking coil A, the current taken is 8A and the power is 120 W, when applied  to a coil B, the current is 10 A and the power is 120 W. What power will be taken when 100 V is applied to the two coils connected in series?<br /> A. 4737 W<br /> B. 140 W<br /> C. 70 W<br /> D. 1454 W<br /> <br /> 42. ECE Board Exam March 1996<br /> The current needed to operate a soldering iron which has a rating of 600 watts at 110 volts is <br /> A. 5.455 A<br /> B. 66,000 A<br /> C. 18,200 A<br /> D. 182 A<br /> <br /> 43. ECE Board Exam March 1996<br /> An interval required to address and read out memory word<br /> A. Propagation delay<br /> B. Pulse duration<br /> C. Settling time<br /> D. Access time<br /> <br /> 44. ECE Board Exam March 1996<br /> When a logic circuit rejects an unwanted signal, this is termed as ________<br /> A. logic levels<br /> B. noise margin<br /> C. power consumption<br /> D. propagation delay<br /> <br /> 45. ECE Board Exam March 1996<br /> What is responsible for the phenomenon when voltages across reactances in series can often be larger than the voltage applied to them?<br /> A. Capacitance<br /> B. Resistance<br /> C. Conductance<br /> D. Resonance<br /> <br /> 46. ECE Board Exam March 1996<br /> How many symbols do hexadecimal digital number system used?<br /> A. 16<br /> B. 4<br /> C. 8<br /> D. 32<br /> <br /> 47. ECE Board Exam March 1996<br /> What is the equivalent of decimal 47 in binary?<br /> A. 111011<br /> B. 111101<br /> C. 110111<br /> D. 101111<br /> <br /> 48. ECE Board Exam March 1996<br /> What is the logic circuit having two or more inputs but only one output with high output if any or all inputs are high, with low output only when all inputs are low?<br /> A. AND gate<br /> B. OR gate<br /> C. NOR gate<br /> D. NAND gate<br /> <br /> 49. ECE Board Exam March 1996<br /> Determine which is not a dynamic test instrument<br /> A. Oscilloscope<br /> B. Logic monitor<br /> C. Logic<br /> D. Logic<br /> <br /> 50. ECE Board Exam March 1996<br /> How much voltage regulation does commercial power supply have?<br /> A. 10% and above<br /> B. Within 1%<br /> C. 15% and above<br /> D. 10%<br /> <div> <br /></div>

ECE Board Exam Reviewer Set 3

ECE Board Exam Reviewer Multiple Choice Questions ECE Board Exam Reviewer 1. ECE Board Exam March 1996 What is a group of circui...

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ECE Board Exam Reviewer Set 2

<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://3.bp.blogspot.com/-fYmpHl3BglU/VQumANlMPTI/AAAAAAAABIs/SW9TKMJ7TZ4/s1600/mcqs-ECE.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="ECE Board Exam Reviewer" border="0" src="http://3.bp.blogspot.com/-fYmpHl3BglU/VQumANlMPTI/AAAAAAAABIs/SW9TKMJ7TZ4/s1600/mcqs-ECE.jpg" title="ECE Board Exam Reviewer" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;"><span style="font-size: 12.8000001907349px;">ECE Board Exam Reviewer</span></td></tr> </tbody></table> <div class="separator" style="clear: both; text-align: center;"> </div> <div class="separator" style="clear: both; text-align: center;"> </div> <b>Multiple Choice Questions</b><br /> <b>ECE Board Exam Reviewer</b><br /> <b><br /></b> 51. ECE Board Exam November 1995<br /> Find voltage regulation of a generator when full-load voltage is 110 V and no-load voltage is 120.<br /> A. 1 %<br /> B. 9.09 %<br /> C. 90.0 %<br /> D. 10 %<br /> <br /> 52. ECE Board Exam November 1995<br /> In a system with MOS devices, the main bus loading factor is likely to be<br /> A. resistive<br /> B. current<br /> C. capacitive<br /> D. static charge<br /> <br /> 53. ECE Board Exam November 1995<br /> The first recipient in E-mail communication.<br /> A. Host<br /> B. Mail box<br /> C. Computer`<br /> D. Disk<br /> <br /> 54. ECE Board Exam November 1995<br /> When a power supply is constructed to operate from either 240V or 120V ac lines such that it will have same secondary output, its primary when connected from 240V must be<br /> A. split into halves and connected in parallel<br /> B. connected in series<br /> C. connected in parallel<br /> D. split into halves and connected in series<br /> <br /> 55. ECE Board Exam November 1995<br /> Which has the largest diameter of the following dry cells?<br /> A. Type C<br /> B. Type AA<br /> C. Type AAA<br /> D. Type D<br /> <br /> 56. ECE Board Exam November 1995<br /> _________ is an output applied to Read Only Memory (ROM).<br /> A. Multiplexer<br /> B. Address<br /> C. Input code<br /> D. Data<br /> <br /> 57. ECE Board Exam November 1995<br /> ________ is a kind of memory where only manufacturer can store program and has a group of memory locations each permanently storing a word.<br /> A. ROM<br /> B. SOS memory<br /> C. RAM<br /> D. Hard Memory<br /> <br /> 58. ECE Board Exam November 1995<br /> _________ is an excess property of P-type semiconductor.<br /> A. Neutron<br /> B. Proton<br /> C. Electron<br /> D. Hole<br /> <br /> 59. ECE Board Exam November 1995<br /> The best way to control speed of an AC induction motor is by varying the ________<br /> A. supply frequency<br /> B. both supply voltage and frequency simultaneously<br /> C. supply voltage<br /> D. series resistance of the field<br /> <br /> 60. ECE Board Exam November 1995<br /> There are _________ identical cells in parallel needed to double the current reading of each cells.<br /> A. 3<br /> B. 4<br /> C. 2<br /> D. 1<br /> <br /> 61. ECE Board Exam November 1995<br /> Two heaters A and B are in parallel across supply voltage V. Heater A produces 500 kcal in 20 minutes and B produces 1000 kcal in 10 minutes. The resistance of A is 10 ohms. What is the resistance of B, if the same heaters are connected in series voltage V?<br /> A. 0.14 ohms<br /> B. 4.5 ohms<br /> C. 2.5 ohms<br /> D. 4.5 ohms<br /> <br /> 62. ECE Board Exam November 1995<br /> ________is a low frequency oscillation which sometimes occurs under fault condition in electron tube circuits.<br /> A. Ping pong<br /> B. Jitter<br /> C. Glitch<br /> D. Motor boating<br /> <br /> 63. ECE Board Exam November 1995<br /> The longer the diameter of a wire, the __________ is its resistance.<br /> A. unstable<br /> B. higher<br /> C. stable<br /> D. lesser<br /> <br /> 64. ECE Board Exam November 1995<br /> When an atom gains an additional ______, it results to a negative ion.<br /> A. neutron<br /> B. proton<br /> C. electron<br /> D. atom<br /> <br /> 65. ECE Board Exam November 1995<br /> _______ refers to circuits with 10 to 100 integrated circuits.<br /> A. IC<br /> B. Monolithic<br /> C. MSI<br /> D. SSI<br /> <br /> 66. ECE Board Exam November 1995<br /> What is the most stable type of biasing?<br /> A. Current feedback<br /> B. Fixed bias<br /> C. Voltage divider<br /> D. Voltage feedback<br /> <br /> 67. ECE Board Exam November 1995<br /> If the gain of an amplifier without feedback is 10 and with negative feedback is 8, then the feedback fraction is<br /> A. 0.025<br /> B. 0.9<br /> C. 0.8<br /> D. 0.225<br /> <br /> 68. ECE Board Exam November 1995<br /> The ________ is an analog component that has two inputs, one inverting and the other non-inverting, and a single output terminal.<br /> A. counter<br /> B. op amp<br /> C. register<br /> D. flip-flop<br /> <br /> 69. ECE Board Exam November 1995<br /> What do you call the duration within it takes to read the content of a memory location after it has been addressed<br /> A. Execution time<br /> B. Data rate<br /> C. Cycle time<br /> D. Access time<br /> <br /> 70. ECE Board Exam November 1995<br /> What term in electronics is used to express how fast energy is consumed?<br /> A. Load<br /> B. Power<br /> C. Conductance<br /> D. Volt<br /> <br /> 71. ECE Board Exam November 1995<br /> If a sine wave voltage varies from 0-200 V, how much is its instant voltage at 90%?<br /> A. 200 V<br /> B. Half of its maximum voltage<br /> C. 100 V<br /> D. Minimum voltage<br /> <br /> 72. ECE Board Exam November 1995<br /> Device that increases power content from an input signal.<br /> A. Attenuator<br /> B. Amplifier<br /> C. Oscillator<br /> D. Transformer<br /> <br /> 73. ECE Board Exam November 1995<br /> What is the lagging effect between the magnetizing force applied and the flux density?<br /> A. Hysteresis<br /> B. Permeance<br /> C. Reluctance<br /> D. Eddy Currents<br /> <br /> 74. ECE Board Exam November 1995<br /> A solid-state device which only gives a “1” output if all its inputs are also “1” is called<br /> A. an AND gate<br /> B. a NAND gate<br /> C. a NOR gate<br /> D. an OR gate<br /> <br /> 75. ECE Board Exam November 1995<br /> How much is the resistance of Germanium slag 10 cm long and cross sectional area of 1 squared cm?<br /> A. 5.5 k ohm<br /> B. 550 k ohm<br /> C. 55 k ohm<br /> D. 550 ohm<br /> <br /> 76. ECE Board Exam November 1995<br /> A _______ is a device which can test all pins of an IC at the same time.<br /> A. logic probe<br /> B. current tracer<br /> C. logic clip<br /> D. pulser<br /> <br /> 77. ECE Board Exam November 1995<br /> Current carried by each of two long parallel conductors is doubled if their separation is also doubled, the force between them would<br /> A. increase four-fold<br /> B. become half<br /> C. increase two-fold<br /> D. remain the same<br /> <br /> 78. ECE Board Exam November 1995<br /> What is the first stage in electronic troubleshooting?<br /> A. Statistical analysis<br /> B. Symptom analysis<br /> C. Diagnostics<br /> D. Initiate plate testing<br /> <br /> 79. ECE Board Exam November 1995<br /> Circuit that transforms dc from one voltage level to another or from one frequency to another<br /> A. Coupler<br /> B. Clipper<br /> C. Comparator<br /> D. Converter<br /> <br /> 80. ECE Board Exam November 1995<br /> ______ is an orderly pattern of combined silicon atoms.<br /> A. Covalent bond<br /> B. Valence orbit<br /> C. Semiconductor<br /> D. Crystal<br /> <br /> 81. ECE Board Exam November 1995<br /> A crystal with its major flat surfaces cut so that they are perpendicular to a mechanical axis of the original quartz crystal is called<br /> A. a Y-cut crystal<br /> B. a Z-cut crystal<br /> C. an XY-cut crystal<br /> D. an X-cut crystal<br /> <br /> 82. ECE Board Exam November 1995<br /> A good material conductor should have _______ valence electrons.<br /> A. 21<br /> B. 1<br /> C. 3.5<br /> D. 10<br /> <br /> 83. ECE Board Exam November 1995<br /> The objective of a capacitor is to<br /> A. block AC and passes DC current<br /> B. block DC and passes AC current<br /> C. stores AC current<br /> D. blocks AC current<br /> <br /> 84. ECE Board Exam November 1995<br /> ________ is the characteristic of an oscillator that enables it to sustain oscillation after removal of the control stimulus.<br /> A. Momentum<br /> B. Fly-wheel effect<br /> C. Damping<br /> D. Forced oscillations<br /> <br /> 85. ECE Board Exam November 1995<br /> __________ is the term used to express the amount of electrical energy in an electrostatic field.<br /> A. Coulombs<br /> B. Watts<br /> C. Volts<br /> D. Joules<br /> <br /> 86. ECE Board Exam November 1995<br /> ______ is a device that stays on once triggered and stores one of two conditions as a digital circuit.<br /> A. Gate<br /> B. Latch<br /> C. Integrator<br /> D. Oscillator<br /> <br /> 87. ECE Board Exam November 1995<br /> When the cells are in series, voltages add, while current capacity is ______.<br /> A. the same as one cell<br /> B. zero<br /> C. infinite<br /> D. the sum of each cell<br /> <br /> 88. ECE Board Exam November 1995<br /> In shift registers made up of several flip-flops, the clock signal indicates ________.<br /> A. a bit of information stored in the flip-flop<br /> B. information of time<br /> C. what time is it<br /> D. when to shift a bit of data from input of the flip-flop to the output<br /> <br /> 89. ECE Board Exam November 1995<br /> A dc voltage supply is measured at 50 V and drops to 25 V when the load is connected. What is the value of “voltage regulation”?<br /> A. 5 %<br /> B. 50 %<br /> C. 8.33 %<br /> D. 11.11 %<br /> <br /> 90. ECE Board Exam November 1995<br /> Which of the following statements is correct?<br /> A. Transistor has two terminals<br /> B. Open resistor has small resistance<br /> C. Typical power rating of a carbon-composition resistor ranged from 0.125 W to 2W<br /> D. Potentiometer has two terminals<br /> <br /> 91. ECE Board Exam November 1995<br /> __________ is the major characteristics of an IC<br /> A. Complication<br /> B. Size<br /> C. Power consumption<br /> D. Speed<br /> <br /> 92. ECE Board Exam November 1995<br /> Find the sum of binary number 1010 and 0011.<br /> a) 1021<br /> b) 1101<br /> c) 1011<br /> d) 1111<br /> <br /> 93. ECE Board Exam November 1995<br /> The loss of electrical energy in counter balancing the residual magnetism in each cycle is called<br /> A. Eddy current loss<br /> B. Hysteresis loss<br /> C. Copper loss<br /> D. Leakage loss<br /> <br /> 94. ECE Board Exam November 1995<br /> In order to simplify a circuit, in analysis and computation the diode is normally assumed as _________<br /> A. zero<br /> B. ideal<br /> C. imaginary<br /> D. infinite<br /> <br /> 95. ECE Board Exam November 1995<br /> Files in an E-mail communication are send thru _________<br /> A. disk<br /> B. mailbox<br /> C. wires<br /> D. attachment<br /> <br /> 96. ECE Board Exam November 1995<br /> An audible tone generated by combining two different frequencies in a non-linear circuit or as sound waves in air is called<br /> A. side tone<br /> B. beat tone<br /> C. heterodyne<br /> D. deadbeat<br /> <br /> 97. ECE Board Exam November 1995<br /> __________ are electrons at the outer shell.<br /> A. Inside shell electrons<br /> B. Conductor electrons<br /> C. Outside shell electrons<br /> D. Valence electrons<br /> <br /> 98. ECE Board Exam November 1995<br /> Solve for flux density (in gauss) from a magnetic flux of 5,000 Mx through a perpendicular are of 2 cm x 5 cm.<br /> A. 5000 G<br /> B. 500 G<br /> C. 10,000 G<br /> D. 50 G<br /> <br /> 99. ECE Board Exam November 1995<br /> Refers to the increased used of data conversion circuits as a result of increased application.<br /> A. OP AMPS<br /> B. Linear circuits<br /> C. Computers<br /> D. Digital equipment<br /> <br /> 100. ECE Board Exam November 1995<br /> The decibel gain of cascaded amplifiers equals the<br /> A. sum of voltage and current gains<br /> B. product of individual gains<br /> C. difference of individual gains<br /> <br /> D. sum of individual gains<br /> <div> <br /></div>

ECE Board Exam Reviewer Set 2

ECE Board Exam Reviewer Multiple Choice Questions ECE Board Exam Reviewer 51. ECE Board Exam November 1995 Find voltage regulati...

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ECE Board Exam Reviewer Set 1

<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://3.bp.blogspot.com/-fYmpHl3BglU/VQumANlMPTI/AAAAAAAABIs/SW9TKMJ7TZ4/s1600/mcqs-ECE.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="ECE Board Exam Reviewer" border="0" src="http://3.bp.blogspot.com/-fYmpHl3BglU/VQumANlMPTI/AAAAAAAABIs/SW9TKMJ7TZ4/s1600/mcqs-ECE.jpg" title="ECE Board Exam Reviewer" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;"><span style="font-size: 12.8000001907349px;">ECE Board Exam Reviewer</span></td></tr> </tbody></table> <div class="separator" style="clear: both; text-align: center;"> </div> <div class="separator" style="clear: both; text-align: center;"> </div> <b>Multiple Choice Questions</b><br /> <b>ECE Board Exam Reviewer</b><br /> <br /> 1. ECE Board Exam November 1995<br /> What is an electronic measuring equipment used in navigation operating in 1GHz band which provides bearing and distance indication?<br /> A. TACAN<br /> B. ODR<br /> C. ILS<br /> D. DME<br /> <br /> 2. ECE Board Exam November 1995<br /> Find the output of four (4) lead acid cells.<br /> A. 3.2 V<br /> B. 8.4 V<br /> C. 5.8 V<br /> D. 1.6 V<br /> <br /> 3. ECE Board Exam November 1995<br /> The reciprocal of capacitance is called<br /> A. elastance<br /> B. permittivity<br /> C. conductance<br /> D. permeability<br /> <br /> 4. ECE Board Exam November 1995<br /> An advantage of full-wave rectifier over half-wave rectifier.<br /> A. Each diode can cool-off during half of each input cycle.<br /> B. The ripple frequency is lower.<br /> C. The tube will conduct during both halves of the cycle.<br /> D. Output voltage is lower with more ripples.<br /> <br /> 5. ECE Board Exam November 1995<br /> What composes all matter whether a liquid, solid or gas?<br /> A. Atoms<br /> B. Electrons<br /> C. Protons<br /> D. Neutrons<br /> <br /> 6. ECE Board Exam November 1995<br /> What is the majority carrier in an N material?<br /> A. Holes<br /> B. Neutrons<br /> C. Electrons<br /> D. Protons<br /> <br /> 7. ECE Board Exam November 1995<br /> A very high resistance connected in parallel with smoothing capacitors in a high voltage DC system is called a<br /> A. dropping resistor<br /> B. shunt<br /> C. divider<br /> D. bleeder<br /> <br /> 8. ECE Board Exam November 1995<br /> What is the smallest part of a computer language?<br /> A. Binary<br /> B. Byte<br /> C. Bit<br /> D. Word<br /> <br /> 9. ECE Board Exam November 1995<br /> A user-program that has the ability to move a robot axis to any position within its range<br /> A. Point-to-point<br /> B. Continuous path<br /> C. Positive stop<br /> D. Pick-and-place<br /> <br /> 10. ECE Board Exam November 1995<br /> What level is used to represent logic-1 in a negative logic circuit?<br /> A. Negative transition level<br /> B. Low level<br /> C. Positive transmission level<br /> D. High level<br /> <br /> 11. ECE Board Exam November 1995<br /> What law in electronics where an induced current will be in such a direction that its own magnetic field will oppose the magnetic field that produces the same?<br /> A. Electromagnetic law<br /> B. Nortons law<br /> C. Lenz law<br /> D. Maxwells law<br /> <br /> 12. ECE Board Exam November 1995<br /> What is the reason why robot actuators have lesser capabilities than electric or hydraulic robot actuators?<br /> A. It has quick response<br /> B. It always has oil leaks<br /> C. It always has all or nothing motion<br /> D. It has high initial cost<br /> <br /> 13. ECE Board Exam November 1995<br /> _______ has the unit of electron volt.<br /> A. Charge<br /> B. Potential difference<br /> C. Energy<br /> D. Current<br /> <br /> 14. ECE Board Exam November 1995<br /> What is the unit of magnetic flux in SI system?<br /> A. Weber<br /> B. Maxwell<br /> C. Tesla<br /> D. Gauss<br /> <br /> 15. ECE Board Exam November 1995<br /> What element possesses four valence electrons?<br /> A. Insulator<br /> B. Semi-insulator<br /> C. Semiconductor<br /> D. Conductor<br /> <br /> 16. ECE Board Exam November 1995<br /> What level is used to represent logic-0 in a negative logic circuit?<br /> A. High level<br /> B. Low level<br /> C. Negative transition level<br /> D. Positive transition level<br /> <br /> 17. ECE Board Exam November 1995<br /> In an Amplitude-Modulated (AM) radio transmitter, the modulator is _________.<br /> A. How amplification can be thought of as a decision making process<br /> B. How semiconductor replace vacuum<br /> C. A digital decision<br /> D. How to adapt a radio transmitter to make it useful as multiplier circuit.<br /> <br /> 18. ECE Board Exam November 1995<br /> Which of the following is the probable output if all inputs of a TTL gate are binary 1?<br /> A. Determinable<br /> B. Binary 0<br /> C. Binary 1<br /> D. Indeterminate<br /> <br /> 19. ECE Board Exam November 1995<br /> Term used to describe sudden reverse conduction of an electronic component caused by excess reverse voltage across the device.<br /> A. Cut-off<br /> B. Saturation<br /> C. Avalanche<br /> D. Revertion<br /> <br /> 20. ECE Board Exam November 1995<br /> Given the two voltages:<br /> S(t)=10cos(ωt+30 degrees)volts<br /> Q(t)=15cos(ωt+45 degrees)volts<br /> Find V(t)=S(t) + Q(t)<br /> <br /> A. V(t)=5.9cos(ωt+71degrees)volts<br /> B. V(t)=24.8cos(ωt+39degrees)volts<br /> C. V(t)=25cos(ωt+75 degrees)volts<br /> D. V(t)=13.6cos(ωt+75degrees)volts<br /> <br /> 21. ECE Board Exam November 1995<br /> What type of materials formed when trivalent material is doped with silicon or germanium?<br /> A. N type<br /> B. N and P type<br /> C. PN type<br /> D. P type<br /> <br /> 22. ECE Board Exam November 1995<br /> What is the degree of exactness of measurement when compared to the expected value of the variable being measured?<br /> A. Accuracy<br /> B. Error<br /> C. Deviation<br /> D. Precision<br /> <br /> 23. ECE Board Exam November 1995<br /> The overall gain of an amplifier in cascade is<br /> A. the sum<br /> B. the average of each<br /> C. the product<br /> D. 100 % the sum<br /> <br /> 24. ECE Board Exam November 1995<br /> _________ is a byte of data stored in a memory location.<br /> A. 8 bits<br /> B. Character<br /> C. 4 bits<br /> D. Memory word<br /> <br /> 25. ECE Board Exam November 1995<br /> An instrument used to measure one location in terms of coordinates.<br /> A. Global Positioning System<br /> B. Hydrometer<br /> C. Altimeter<br /> D. Increductometer<br /> <br /> 26. ECE Board Exam November 1995<br /> How do you measure the current in a circuit without an ammeter?<br /> A. By computing the values of resistance<br /> B. Measure voltage drop across tube<br /> C. Measure voltage drop across known resistor<br /> D. Divide total circuit resistance by the total circuit load<br /> <br /> 27. ECE Board Exam November 1995<br /> _________ is retrieving data from memory.<br /> A. Accessing<br /> B. Getting<br /> C. Encoding<br /> D. Reading<br /> <br /> <br /> 28. ECE Board Exam November 1995<br /> Materials with permeabilities slightly less than that of free space are referred to as<br /> A. diamagnetic<br /> B. ferromagnetic<br /> C. non-magnetic<br /> D. paramagnetic<br /> <br /> 29. ECE Board Exam November 1995<br /> ________ can erase EPROMS.<br /> A. Applying a 21-volt pulse<br /> B. Applying ultraviolet rays<br /> C. Turning off the power<br /> D. Blowing fuse<br /> <br /> 30. ECE Board Exam November 1995<br /> What materials possess permeabilities slightly less than that of free space?<br /> A. Non-magnetic<br /> B. Diamagnetic<br /> C. Paramagnetic<br /> D. Ferromagnetic<br /> <br /> 31. ECE Board Exam November 1995<br /> An LC circuit resonates at 2000 kHz and has a Q of 100. Find the lower and upper cut-off frequencies.<br /> A. 1950 kHz, 2050 kHz<br /> B. 1900 kHz, 2100 kHz<br /> C. 1990 kHz, 2010 kHz<br /> D. 1980 kHz, 2020 kHz<br /> <br /> 32. ECE Board Exam November 1995<br /> Find the ripple factor (Kr) of a sinusoidal signal with peak ripple of 4 volts and an average of 30.<br /> A. 0.094<br /> B. 0.013<br /> C. 0.130<br /> D. 0.94<br /> <br /> 33. ECE Board Exam November 1995<br /> The term “Fully Saturated” for a transistor refers to:<br /> A. the collector current at its maximum value<br /> B. the collector current at its minimum value<br /> C. the transistor’s beta at its maximum value<br /> D. the transistor’s alpha at its maximum value<br /> <br /> 34. ECE Board Exam November 1995<br /> The _________ grid in an electron tube is where the input signal is usually applied.<br /> A. screen<br /> B. control<br /> C. bias<br /> D. supression<br /> <br /> 35. ECE Board Exam November 1995<br /> If three amplifiers with a gain of 8 each are in cascade, how much is the overall gain?<br /> A. 72<br /> B. 24<br /> C. 512<br /> D. 8<br /> <br /> 36. ECE Board Exam November 1995<br /> _______ is a pn junction semiconductor device that emits noncoherent optical radiation when biased in the forward direction, as a result of a recombination effect.<br /> A. LASER<br /> B. JUGFET<br /> C. LED<br /> D. Optical cavity<br /> <br /> 37. ECE Board Exam November 1995<br /> What do you call the force which sets up or tends to set up magnetic flux in a magnetic circuit?<br /> A. Electromotive force<br /> B. Potential difference<br /> C. Magnetomotive force<br /> D. Dynamic force<br /> <br /> 38. ECE Board Exam November 1995<br /> Silicon diodes are used in a two-diode full-wave rectifier circuit to supply a load of 12 volts DC. Assuming ideal diodes and the load resistance is 12 ohms, compute the efficiency of the rectifier in percentage.<br /> A. 5.8<br /> B. 75<br /> C. 95.7<br /> D. 81.2<br /> <br /> 39. ECE Board Exam November 1995<br /> In order to match the load to the generator means making load resistance _________.<br /> A. increased to more of generator’s internal resistance<br /> B. equal to generator’s internal resistance<br /> C. decreased<br /> D. lowered than generator’s internal resistance<br /> <br /> 40. ECE Board Exam November 1995<br /> The purpose of installing thyrectors across the incoming power lines to speed the control system is to ______.<br /> A. cause the motor to caution<br /> B. protect drive circuits from high voltage transient surges<br /> C. increase counter-emf<br /> D. allow the field winding current to continue flowing<br /> <br /> 41. ECE Board Exam November 1995<br /> The base SI unit of luminous intensity is<br /> A. lux<br /> B. lumen<br /> C. candela<br /> D. lambert<br /> <br /> 42. ECE Board Exam November 1995<br /> The portion of the weld interval during which welding current is flowing<br /> A. Heat subinterval<br /> B. Release interval<br /> C. Cool interval<br /> D. Squeeze interval<br /> <br /> 43. ECE Board Exam November 1995<br /> The difference in energy between the valence and conduction bands of a semiconductor is called<br /> A. band gap<br /> B. extrinsic photoeffect<br /> C. conductivity<br /> D. energy-density<br /> <br /> 44. ECE Board Exam November 1995<br /> ________ is a segment register which normally accesses variables in the program.<br /> A. Extra<br /> B. Stack<br /> C. Data<br /> D. Code<br /> <br /> 45. ECE Board Exam November 1995<br /> What is the range of audio frequency?<br /> A. 10 to 10,000 Hz<br /> B. 16 to 20,000 Hz<br /> C. 3 to 2,000 kHz<br /> D. 10 to 2,000 Hz<br /> <br /> 46. ECE Board Exam November 1995<br /> A __________ is a storage device used to accommodate a difference in rate of flow of data or time of occurrence of events when transmitting from one device to another.<br /> A. Accumulator<br /> B. Buffer<br /> C. Modem<br /> D. Register<br /> <br /> 47. ECE Board Exam November 1995<br /> Solve the collector current if base current is 200 mA and the current gain is 20.<br /> A. 10 A<br /> B. 4 A<br /> C. 1 A<br /> D. 40 A<br /> <br /> 48. ECE Board Exam November 1995<br /> _____ is the specific gravity reading for a good lead-acid cell.<br /> A. 1170<br /> B. 1270<br /> C. 1070<br /> D. 1370<br /> <br /> 49. ECE Board Exam November 1995<br /> ___________ refers to BCD counter<br /> A. Decade counter<br /> B. Shift relay<br /> C. Frequency divider<br /> D. Binary counter<br /> <br /> 50. ECE Board Exam November 1995<br /> The typical number of bits per dynamic memory location is<br /> A. 1<br /> B. 8<br /> C. 2<br /> D. 16<br /> <div> <br /></div>

ECE Board Exam Reviewer Set 1

ECE Board Exam Reviewer Multiple Choice Questions ECE Board Exam Reviewer 1. ECE Board Exam November 1995 What is an electronic ...

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MCQs / Engineering Reviewer - Electricity and Magnetism Fundamentals Part 6

<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td style="text-align: center;"><a href="http://2.bp.blogspot.com/-QgDtnOlr1A0/VQunJ9xUFPI/AAAAAAAABI8/prZSaus1tso/s1600/mcqs-electricty-magnetism.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="MCQs on Electricity and Magnetism Fundamentals" border="0" src="http://2.bp.blogspot.com/-QgDtnOlr1A0/VQunJ9xUFPI/AAAAAAAABI8/prZSaus1tso/s1600/mcqs-electricty-magnetism.jpg" title="MCQs on Electricity and Magnetism Fundamentals" /></a></td></tr> <tr><td class="tr-caption" style="text-align: center;"><span style="font-size: 12.8000001907349px;">Engineering Reviewer - Electricity and Magnetism Fundamentals</span></td></tr> </tbody></table> <b>Multiple Choice Questions</b><br /> <b>Electricity and Magnetism Fundamentals</b><br /> <br /> 251. The relation between absolute permittivity of air (ε0), absolute permeability of air (μ0) and velocity of light (c) is given by<br /> A. μ0ε0 = c^2<br /> B. μ0ε0 = c<br /> C. 1/μ0ε0 = c<br /> D. 1/μ0ε0 = c^2<br /> <br /> 252. The dielectric constant of most materials lies between<br /> A. 1 and 10<br /> B. 10 and 20<br /> C. 20 and 50<br /> D. 50 and 100<br /> <br /> 253. A test charge means a charge of<br /> A. -1 C<br /> B. 1 electron<br /> C. +1 C<br /> D. -20 C<br /> <br /> 254. Electric lines of force leave or enter the charge surface at an angle of<br /> A. 30̊<br /> B. 45̊<br /> C. 90̊<br /> D. depending upon the angle of launch and entry<br /> <br /> 255. Electric field intensity is measured in<br /> A. volts/meter<br /> B. Newton/meter<br /> C. Newton-meter<br /> D. Amperes/meter<br /> <br /> 256. Electric field intensity is a ________.<br /> A. scalar<br /> B. phasor<br /> C. vector<br /> D. variable<br /> <br /> 257. Electric field intensity at a point due to a given charge ______ if the relative permittivity of the medium decreases.<br /> A. decreases<br /> B. remains unchanged<br /> C. increases<br /> D. becomes zero<br /> <br /> 258. The electric field intensity between the parallel plate air capacitor is 20 N/C. If an insulating slab of relative permittivity 5 is placed between the plates, then electric field intensity will be<br /> A. 20 N/C<br /> B. 100 N/C<br /> C. 4 N/C<br /> D. 40 N/C<br /> <br /> 259. The electric flux density is a ________ quantity.<br /> A. phasor<br /> B. vector<br /> C. scalar<br /> D. variable<br /> <br /> 260. The permittivity of a material is given by one of the following formulas.<br /> A. DE<br /> B. E/D<br /> C. D^2/E<br /> D. D/E<br /> <br /> 261. Electric field intensity at a point is numerically equal to ________ at that point.<br /> A. potential gradient<br /> B. potential difference<br /> C. dielectric constant<br /> D. the force<br /> <br /> 262. Three charges of +5 C, -6 C and +9 C are placed inside a sphere. What is the total flux passing through the surface of sphere?<br /> A. 8 C<br /> B. 14 C<br /> C. 20 C<br /> D. -6 C<br /> <br /> 263. The potential at a point due to a charge is 15 V. If the distance is increased three times, the potential at the point will be<br /> A. 5 V<br /> B. 18 V<br /> C. 45 V<br /> D. 15 V<br /> <br /> 264. Electric potential is a _______ quantity.<br /> A. scalar<br /> B. phasor<br /> C. vector<br /> D. variable<br /> <br /> 265. The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium of relative permittivity of 3, then electric potential at that point will be<br /> A. 63 V<br /> B. 21 V<br /> C. 7 V<br /> D. 42 V<br /> <br /> 266. The electric potential across part AB of a circuit is 5 V; point A being at higher potential. If a charge of 5 C moves from A to B, then energy released as<br /> A. 5 joules<br /> B. 25 joules<br /> C. 10 joules<br /> D. 100 joules<br /> <br /> 267. What is the other name for dielectric strength?<br /> A. Breakdown voltage<br /> B. Electric intensity<br /> C. Potential gradient<br /> D. Dielectric constant<br /> <br /> 268. Which of the following materials has the highest dielectric strength?<br /> A. Glass<br /> B. Oiled paper<br /> C. Mica<br /> D. Air<br /> <br /> 269. What is used as the insulating material or dielectric in an electric ion?<br /> A. Oiled paper<br /> B. Mica<br /> C. Paraffin<br /> D. Titanate compound<br /> <br /> 270. What is used as the dielectric material in high voltage transformers?<br /> A. Mica<br /> B. Paraffin<br /> C. Porcelain<br /> D. Oiled paper<br /> <br /> 271. One farad equals<br /> A. 1 coulomb/volt<br /> B. 1 newton/coulomb<br /> C. 1 newton-meter<br /> D. 1 volt/second/ampere<br /> <br /> 272. Which of the following is used by permanent magnets as the magnetic material?<br /> A. iron<br /> B. nickel<br /> C. soft steel<br /> D. hardened steel<br /> <br /> 273. Which of the following is used by temporary magnets as the magnetic material?<br /> A. Hardened steel<br /> B. Cobalt steel<br /> C. Soft iron<br /> D. Tungsten steel<br /> <br /> 274. What is the main advantage of temporary magnets?<br /> A. The magnetic flux can be changed.<br /> B. Hysteresis can be decreased.<br /> C. Magnetic materials can be used.<br /> D. Abundance of ferromagnetic material that can be temporarily magnetized.<br /> <br /> 275. Permanent magnets can be found in<br /> A. electric bells<br /> B. earphones<br /> C. relays<br /> D. dynamic loudspeakers<br /> <br /> 276. Temporary magnets are commonly employed in<br /> A. electric instruments<br /> B. motors<br /> C. moving coils loudspeakers<br /> D. magnetos<br /> <br /> 277. The force between two magnetic poles is _______ their pole strengths.<br /> A. directly proportional to<br /> B. the sum of<br /> C. inversely proportional to<br /> D. the product of<br /> <br /> 278. If the distance between two magnetic poles decreases by 2 times, the force between them<br /> A. decreases two times<br /> B. increases four times<br /> C. increases two times<br /> D. decreases four times<br /> <br /> 279. The force between two magnetic poles is _____ the relative permeability of the medium.<br /> A. directly proportional to<br /> B. independent of<br /> C. inversely proportional to<br /> D. equal to<br /> <br /> 280. Two similar poles, each 1Wb, placed 1 m apart in air will experience a repulsive force of<br /> A. 63000 N<br /> B. 63 × 10^-3 N<br /> C. 8 × 10^12 N<br /> D. 796 kN<br /> <br /> 281. One weber of flux is equal to _______ magnetic lines of force.<br /> A. 10^6<br /> B. 10^10<br /> C. 4π × 10^7<br /> D. 10^8<br /> <br /> 282. The unit of flux density is<br /> A. Wb/m<br /> B. Tesla<br /> C. At/m<br /> D. N/Wb<br /> <br /> 283. What is the typical saturation flux density for most magnetic materials?<br /> A. 4 Wb/m^2<br /> B. 5 Wb/m^2<br /> C. 1 Wb/m^2<br /> D. 2 Wb/m^2<br /> <br /> 284. Magnetic field intensity is a ________ quantity.<br /> A. scalar<br /> B. phasor<br /> C. vector<br /> D. variable<br /> <br /> 285. The force acting on a pole of 5 Wb is 25 N. What is the intensity of the magnetic field?<br /> A. 5 N/Wb<br /> B. 25 N/Wb<br /> C. 125 N/Wb<br /> D. 0.2 N/Wb<br /> <br /> 286. The relative permeability of a magnetic material is 10^5. What is its permeability?<br /> <br /> A. 4π × 10^5 H/m<br /> B. 4π × 10^-12 H/m<br /> C. 4π × 10^-2 H/m<br /> D. 4π × 10^-7 H/m<br /> <br /> 287. Which of the following has the highest permeability?<br /> A. Soft iron<br /> B. Steel<br /> C. Air<br /> D. Permalloy<br /> <br /> 288. A magnetic pole produces 5000 field lines. How much is the flux in webers?<br /> A. 50 × 10^-6<br /> B. 5 × 10^-6<br /> C. 500 × 10^-6<br /> D. 500 × 10^-5<br /> <br /> 289. As the magnetic intensity decreases, the relative permeability of a magnetic material<br /> A. decreases<br /> B. remains the same<br /> C. increases<br /> D. becomes zero<br /> <br /> 290. The permeability of a material having a flux density of 5 Wb/m^2 is 10^-5 H/m. What is the value of magnetizing force?<br /> A. 5 × 10^-5 N/Wb<br /> B. 500 × 10^3 N/Wb<br /> C. 4π × 10^-7 N/Wb<br /> D. 4π × 10^7 N/Wb<br /> <br /> 291. When the relative permeability of a material is slightly less than 1, it is called _____ material.<br /> A. diamagnetic<br /> B. ferromagnetic<br /> C. paramagnetic<br /> D. non-magnetic<br /> <br /> 292. When the relative permeability of a material is slightly more than 1, it is called ______ material.<br /> A. diamagnetic<br /> B. ferromagnetic<br /> C. paramagnetic<br /> D. non-magnetic<br /> <br /> 293. Which of the following is a diamagnetic material?<br /> A. Aluminum<br /> B. Silver<br /> C. Air<br /> D. Cobalt<br /> <br /> 294. Which of the following is a paramagnetic material?<br /> A. Carbon<br /> B. Bismuth<br /> C. Copper<br /> D. Oxygen<br /> <br /> 295. The greater percentage of materials is _________.<br /> A. diamagnetic<br /> B. paramagnetic<br /> C. ferromagnetic<br /> D. non-magnetic<br /> <br /> 296. When the relative permeability of a material is much greater than 1, it is called _______ material.<br /> A. diamagnetic<br /> B. ferromagnetic<br /> C. paramagnetic<br /> D. non-magnetic<br /> <br /> 297. The flux density in an air-cored coil is 10^-3 Wb/m^2. With a cast iron core of relative permeability 100 inserted, the flux density will become<br /> A. 10^-3 Wb/m^2<br /> B. 10^-2 Wb/m^2<br /> C. 10^3 Wb/m^2<br /> D. 0.1 Wb/m^2<br /> <br /> 298. At/m is a unit of<br /> A. mmf<br /> B. magnetic force<br /> C. reluctance<br /> D. magnetic flux density<br /> <br /> 299. The direction of force o a current carrying conductor placed in a magnetic field can be found by<br /> A. Cork screw rule<br /> B. Fleming’s left hand rule<br /> C. Fleming’s right hand rule<br /> D. using a compass<br /> <br /> 300. When a current carrying conductor is placed in a magnetic field, the maximum force will act on the conductor when the conductor is at an angle of _______ to the magnetic field.<br /> <br /> A. 45<span style="background-color: white; color: #545454; font-family: arial, sans-serif; font-size: x-small; line-height: 18.2000007629395px;">°</span><br /> B. 60<span style="background-color: white; color: #545454; font-family: arial, sans-serif; font-size: x-small; line-height: 18.2000007629395px;">°</span><br /> C. 30<span style="background-color: white; color: #545454; font-family: arial, sans-serif; font-size: x-small; line-height: 18.2000007629395px;">°</span><br /> D. 90<span style="background-color: white; color: #545454; font-family: arial, sans-serif; font-size: x-small; line-height: 18.2000007629395px;">°</span><br /> <div> <br /> <br /> Click the download button below to download this practice set <i>with answers</i> in PDF format.<br /> <a href="http://sh.st/g0b8i" target="_blank"><img alt="Engineering Reviewer" border="0" src="http://2.bp.blogspot.com/-_PFABbawQHQ/VA0kf6_YvjI/AAAAAAAAAZI/9qzE0TiS5Qs/s1600/dl.png" /></a></div>

MCQs / Engineering Reviewer - Electricity and Magnetism Fundamentals Part 6

Engineering Reviewer - Electricity and Magnetism Fundamentals Multiple Choice Questions Electricity and Magnetism Fundamentals 251. T...

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MCQs / Engineering Reviewer - Electricity and Magnetism Fundamentals Part 5

<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody> <tr><td><a href="http://2.bp.blogspot.com/-QgDtnOlr1A0/VQunJ9xUFPI/AAAAAAAABI8/prZSaus1tso/s1600/mcqs-electricty-magnetism.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="MCQs on Electricity and Magnetism Fundamentals" border="0" src="http://2.bp.blogspot.com/-QgDtnOlr1A0/VQunJ9xUFPI/AAAAAAAABI8/prZSaus1tso/s1600/mcqs-electricty-magnetism.jpg" title="MCQs on Electricity and Magnetism Fundamentals" /></a></td></tr> <tr><td class="tr-caption" style="font-size: 12.8000001907349px;"><span style="font-size: 12.8000001907349px;">Engineering Reviewer - Electricity and Magnetism Fundamentals</span></td></tr> </tbody></table> <b>Multiple Choice Questions</b><br /> <b>Electricity and Magnetism Fundamentals</b><br /> <div> <br /></div> <div> <div> 200. Which of the following materials has the least hysteresis loop area?</div> <div> A. soft iron</div> <div> B. silicon steel</div> <div> C. hard steel</div> <div> D. wrought iron</div> <div> <br /></div> <div> 201. Core materials of a good relay have _________ hysteresis loop.</div> <div> A. large</div> <div> B. narrow</div> <div> C. very large</div> <div> D. very narrow</div> <div> <br /></div> <div> 202. The magnetic materials should have a large hysteresis loss for one of the following applications.</div> <div> A. Transformers</div> <div> B. AC motors</div> <div> C. Permanent Magnets</div> <div> D. DC generators</div> <div> <br /></div> <div> 203. If the magnetic material is located within a coil through which alternating current (60 Hz frequency) flows, then __________ hysteresis loops will be formed every second.</div> <div> A. 60</div> <div> B. 120</div> <div> C. 30</div> <div> D. 180</div> <div> <br /></div> <div> 204. There are how many compounds available in nature?</div> <div> A. 105</div> <div> B. 1000</div> <div> C. 300,000</div> <div> D. Unlimited</div> <div> <br /></div> <div> 205. Hysteresis is a phenomenon of _________ in a magnetic circuit.</div> <div> A. setting up constant flux</div> <div> B. lagging of H behind B</div> <div> C. lagging B behind H</div> <div> D. leading B ahead H</div> <div> <br /></div> <div> 206. What is the measure of the density and sign of the electric charge at a point relative to that at some time?</div> <div> A. Electric potential</div> <div> B. Electric charge</div> <div> C. Electric current</div> <div> D. Electric intensity</div> <div> <br /></div> <div> 207.  __________ is a substance of whose molecules consist of the same kind of atom.</div> <div> A. Mixture</div> <div> B. Compound</div> <div> C. Element</div> <div> D. Isotope</div> <div> <br /></div> <div> 208. Hipernik is an alloy containing __________ iron and __________ nickel.</div> <div> A.  40% ; 60%</div> <div> B. 60% ; 40%</div> <div> C. 50% ; 50%</div> <div> D. 70% ; 30%</div> <div> <br /></div> <div> 209.  The mass of proton is __________ the mass of an electron.</div> <div> A. equal to</div> <div> B. about 1837 times</div> <div> C. less than</div> <div> D. 200 times</div> <div> <br /></div> <div> 210. What is the maximum number of electrons that can be accommodated in the last orbit of an atom?</div> <div> A. 4</div> <div> B. 2</div> <div> C. 8</div> <div> D. 18</div> <div> <br /></div> <div> 211. The electrons in the last orbit of an atom are called _______ electrons.</div> <div> A. free</div> <div> B. valence</div> <div> C. bound</div> <div> D. thermionic</div> <div> <br /></div> <div> 212. If the number of valence electrons of an atom is less than 4, the substance is called</div> <div> A. a conductor</div> <div> B. a semiconductor</div> <div> C. an insulator</div> <div> D. a superconductor</div> <div> <br /></div> <div> 213. If the number of valence electrons of an atom is more than 4, the substance is called</div> <div> A. a semiconductor</div> <div> B. a conductor</div> <div> C. an insulator</div> <div> D. a semi-insulator</div> <div> <br /></div> <div> 214. If the number of valence electrons of an atom is exactly 4, then the substance is called</div> <div> A. a semiconductor</div> <div> B. a conductor</div> <div> C. an insulator</div> <div> D. a cryogenic conductor</div> <div> <br /></div> <div> 215. If the number of valence electrons of an atom is less than 4, then the substance is probably</div> <div> A. a metal</div> <div> B. an insulator</div> <div> C. a non-metal</div> <div> D. a semiconductor</div> <div> <br /></div> <div> 216. One coulomb of charge consists of ________ electrons.</div> <div> A. 624 × 10^16</div> <div> B. 62.4 × 10^16</div> <div> C. 6.24 × 10^16</div> <div> D. 0.624 × 10^16</div> <div> <br /></div> <div> 217. A one cubic cm of copper has how many free electrons at room temperature?</div> <div> A. 80 × 10^18</div> <div> B. 8.5 × 10^22</div> <div> C. 20 × 10^10</div> <div> D. 50 × 10^20</div> <div> <br /></div> <div> 218. Electronic current in a wire is the flow of ____________ electrons.</div> <div> A. free</div> <div> B. valence</div> <div> C. bound</div> <div> D. loose</div> <div> <br /></div> <div> 219. Electromotive force in a circuit</div> <div> A. causes free electrons to flow</div> <div> B. increases the circuit resistance</div> <div> C. maintains circuit resistance</div> <div> D. is needed to make the circuit complete</div> <div> <br /></div> <div> 220. The resistance of a material is ____________ its area of cross-section.</div> <div> A. directly proportional</div> <div> B. independent of</div> <div> C. inversely proportional to</div> <div> D. equal to</div> <div> <br /></div> <div> 221. If the length and area of cross-section of a wire are doubled, then its resistance</div> <div> A. becomes four times</div> <div> B. becomes sixteen times</div> <div> C. remains the same</div> <div> D. becomes two times</div> <div> <br /></div> <div> 222. A length of wire has a resistance of 10 ohms. What is the resistance of a wire of the same material three times as long and twice the cross-sectional area?</div> <div> A. 30 ohms</div> <div> B. 20 ohms</div> <div> C. 15 ohms</div> <div> D. 7 ohms</div> <div> <br /></div> <div> 223. What is the SI unit of specific resistance or resistivity?</div> <div> A. Ohm-circular mil per inch</div> <div> B. Ohm-circular mil per foot</div> <div> C. Ohm-m</div> <div> D. Ohm-cm</div> <div> <br /></div> <div> 224. The resistivity of a conductor ___________ with an increase in temperature.</div> <div> A. increases</div> <div> B. decreases</div> <div> C. remains the same</div> <div> D. becomes zero</div> <div> <br /></div> <div> 225. What is the SI unit of conductance?</div> <div> A. Siemens</div> <div> B. Mhos</div> <div> C. Ohms</div> <div> D. 1/Ohms</div> <div> <br /></div> <div> 226. If the resistance of a material 2 m long and 2 m^2 in area of cross-section is 1.6 ×10^-8 Ω, then its resistivity is</div> <div> A. 3.2 × 10^-8 Ω-m</div> <div> B. 1.6 × 10^-8 Ω-m</div> <div> C. 0.64 × 10^-8 Ω-m</div> <div> D. 0.16 × 10^-8 Ω-m </div> <div> <br /></div> <div> 227. What is the SI unit of conductivity?</div> <div> A. Ohms/m</div> <div> B. Ohms-m</div> <div> C. Siemens-m</div> <div> D. Siemens/m</div> <div> <br /></div> <div> 228. The temperature coefficient of resistance of conductors is</div> <div> A. positive</div> <div> B. zero</div> <div> C. negative</div> <div> D. infinite</div> <div> <br /></div> <div> 229. The temperature coefficient of resistance of semiconductors is</div> <div> A. positive</div> <div> B. zero</div> <div> C. negative</div> <div> D. infinite</div> <div> <br /></div> <div> 230. What determines the value of the temperature coefficient of resistance of a material?</div> <div> A. length</div> <div> B. cross-sectional area</div> <div> C. volume</div> <div> D. nature and temperature</div> <div> <br /></div> <div> 231. The temperature coefficient of resistance of a conductor ______ with an increase in temperature.</div> <div> A. increases</div> <div> B. decreases</div> <div> C. remains the same</div> <div> D. becomes negative</div> <div> <br /></div> <div> 232. The temperature coefficient of resistance of insulators is</div> <div> A. zero</div> <div> B. negative</div> <div> C. positive</div> <div> D. infinite</div> <div> <br /></div> <div> 233. The temperature coefficient of resistance of eureka is</div> <div> A. positive</div> <div> B. negative</div> <div> C. almost zero</div> <div> D. infinite</div> <div> <br /></div> <div> 234. If the value of α0 a conductor is 1/234 per oC, then the value of α18 is</div> <div> A. 1/218 per oC</div> <div> B. 1/252 per oC</div> <div> C. 1/272 per oC</div> <div> D. 1/273 per oC</div> <div> <br /></div> <div> 235. If the value of α25 a conductor is 1/255 per oC, then the value of α20 is</div> <div> A. 1/300 per oC</div> <div> B. 1/250 per oC</div> <div> C. 1/230 per oC</div> <div> D. 1/260 per oC</div> <div> <br /></div> <div> 236. If the value of α25 of a conductor is 1/230 per oC, then the value of α0 is</div> <div> A. 1/180 per oC</div> <div> B. 1/150 per oC</div> <div> C. 1/280 per oC</div> <div> D. 1/230 per oC</div> <div> <br /></div> <div> 237. Ohm’s law cannot be applied to which material?</div> <div> A. Copper</div> <div> B. Silver</div> <div> C. Silicon carbide</div> <div> D. Aluminum</div> <div> <br /></div> <div> 238. What is the practical unit of electrical energy?</div> <div> A. Watt</div> <div> B. Kilowatt-hour</div> <div> C. Kilowatt-second</div> <div> D. Megawat-hour</div> <div> <br /></div> <div> 239. A 200-watt lamp working for 24 hours will consume approximately _____ units.</div> <div> A. 50</div> <div> B. 5</div> <div> C. 24</div> <div> D. 0.5</div> <div> <br /></div> <div> 240. The hot resistance of an incandescent lamp is about _______ its cold resistance.</div> <div> A. 10 times</div> <div> B. 100 times</div> <div> C. 5 times</div> <div> D. 50 times </div> <div> <br /></div> <div> 241. Under ordinary conditions, a body is considered</div> <div> A. positively charged</div> <div> B. neutral</div> <div> C. negatively charged</div> <div> D. stable</div> <div> <br /></div> <div> 242. A positively charged body has</div> <div> A. deficit of electrons</div> <div> B. excess of neutrons</div> <div> C. excess of electrons</div> <div> D. deficit of protons</div> <div> <br /></div> <div> 243. A negatively charge body has</div> <div> A. deficit of electrons</div> <div> B. excess of protons</div> <div> C. excess of electrons</div> <div> D. deficit of neutrons </div> <div> <br /></div> <div> 244. This paper does not exhibit electricity because it contains the same number of</div> <div> A. protons and electrons</div> <div> B. neutrons and electrons</div> <div> C. neutrons and positrons</div> <div> D. atoms</div> <div> <br /></div> <div> 245. What is the value of the absolute permittivity of air?</div> <div> A. 8.854 μF/m</div> <div> B. 8.854 × 10^-12 mF/m</div> <div> C. 8.854 × 10^-12 F/m</div> <div> D. 8.854 × 10^-12 μF/m</div> <div> <br /></div> <div> 246. What is the relative permittivity of air?</div> <div> A. 0</div> <div> B. 1</div> <div> C. 8.854 × 10^-12</div> <div> D. 4π × 10^-7</div> <div> <br /></div> <div> 247. If two similar charges 1 coulomb each are placed 1 m apart in air, then the force of repulsion is</div> <div> A.8 × 10^6 N</div> <div> B. 9 × 10 ^9 N</div> <div> C. 10^6 N</div> <div> D. 5 × 10^6 N</div> <div> <br /></div> <div> 248. If the relative permittivity of a material is 10, then its permittivity is</div> <div> A. 4π × 10^-7 F/m</div> <div> B. 4π × 10^-6 F/m</div> <div> C. 8.854 × 10^-11 F/m</div> <div> D. 8.854 × 10^-12 F/m</div> <div> <br /></div> <div> 249. The force between two charges placed a given distance apart ______ as the relative permittivity of the medium is increased.</div> <div> A. increases</div> <div> B. decreases</div> <div> C. remains unchanged</div> <div> D. becomes infinite</div> <div> <br /></div> <div> 250. What is another name for relative permittivity?</div> <div> A. Dielectric strength</div> <div> B. Electric intensity</div> <div> C. Potential gradient</div> <div> D. Dielectric constant</div> </div> <div> <br /> <br /> Click the download button below to download this practice set <i>with answers</i> in PDF format.<br /> <a href="http://sh.st/g0b4s" target="_blank"><img alt="Engineering Reviewer" border="0" src="http://2.bp.blogspot.com/-_PFABbawQHQ/VA0kf6_YvjI/AAAAAAAAAZI/9qzE0TiS5Qs/s1600/dl.png" /></a></div>

MCQs / Engineering Reviewer - Electricity and Magnetism Fundamentals Part 5

Engineering Reviewer - Electricity and Magnetism Fundamentals Multiple Choice Questions Electricity and Magnetism Fundamentals 200...

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