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ECE Board Exam Reviewer
ECE Board Exam Reviewer
Multiple Choice Questions
ECE Board Exam Reviewer

51. ECE Board Exam November 1995
Find voltage regulation of a generator when full-load voltage is 110 V and no-load voltage is 120.
A. 1 %
B. 9.09 %
C. 90.0 %
D. 10 %

52. ECE Board Exam November 1995
In a system with MOS devices, the main bus loading factor is likely to be
A. resistive
B. current
C. capacitive
D. static charge

53. ECE Board Exam November 1995
The first recipient in E-mail communication.
A. Host
B. Mail box
C. Computer`
D. Disk

54. ECE Board Exam November 1995
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
A. split into halves and connected in parallel
B. connected in series
C. connected in parallel
D. split into halves and connected in series

55. ECE Board Exam November 1995
Which has the largest diameter of the following dry cells?
A. Type C
B. Type AA
C. Type AAA
D. Type D

56. ECE Board Exam November 1995
_________ is an output applied to Read Only Memory (ROM).
A. Multiplexer
B. Address
C. Input code
D. Data

57. ECE Board Exam November 1995
________ is a kind of memory where only manufacturer can store program and has a group of memory locations each permanently storing a word.
A. ROM
B. SOS memory
C. RAM
D. Hard Memory

58. ECE Board Exam November 1995
_________ is an excess property of P-type semiconductor.
A. Neutron
B. Proton
C. Electron
D. Hole

59. ECE Board Exam November 1995
The best way to control speed of an AC induction motor is by varying the ________
A. supply frequency
B. both supply voltage and frequency simultaneously
C. supply voltage
D. series resistance of the field

60. ECE Board Exam November 1995
There are _________ identical cells in parallel needed to double the current reading of each cells.
A. 3
B. 4
C. 2
D. 1

61. ECE Board Exam November 1995
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?
A. 0.14 ohms
B. 4.5 ohms
C. 2.5 ohms
D. 4.5 ohms

62. ECE Board Exam November 1995
________is a low frequency oscillation which sometimes occurs under fault condition in electron tube circuits.
A. Ping pong
B. Jitter
C. Glitch
D. Motor boating

63. ECE Board Exam November 1995
The longer the diameter of a wire, the __________ is its resistance.
A. unstable
B. higher
C. stable
D. lesser

64. ECE Board Exam November 1995
When an atom gains an additional ______, it results to a negative ion.
A. neutron
B. proton
C. electron
D. atom

65. ECE Board Exam November 1995
_______ refers to circuits with 10 to 100 integrated circuits.
A. IC
B. Monolithic
C. MSI
D. SSI

66. ECE Board Exam November 1995
What is the most stable type of biasing?
A. Current feedback
B. Fixed bias
C. Voltage divider
D. Voltage feedback

67. ECE Board Exam November 1995
If the gain of an amplifier without feedback is 10 and with negative feedback is 8, then the feedback fraction is
A. 0.025
B. 0.9
C. 0.8
D. 0.225

68. ECE Board Exam November 1995
The ________ is an analog component that has two inputs, one inverting and the other non-inverting, and a single output terminal.
A. counter
B. op amp
C. register
D. flip-flop

69. ECE Board Exam November 1995
What do you call the duration within it takes to read the content of a memory location after it has been addressed
A. Execution time
B. Data rate
C. Cycle time
D. Access time

70. ECE Board Exam November 1995
What term in electronics is used to express how fast energy is consumed?
A. Load
B. Power
C. Conductance
D. Volt

71. ECE Board Exam November 1995
If a sine wave voltage varies from 0-200 V, how much is its instant voltage at 90%?
A. 200 V
B. Half of its maximum voltage
C. 100 V
D. Minimum voltage

72. ECE Board Exam November 1995
Device that increases power content from an input signal.
A. Attenuator
B. Amplifier
C. Oscillator
D. Transformer

73. ECE Board Exam November 1995
What is the lagging effect between the magnetizing force applied and the flux density?
A. Hysteresis
B. Permeance
C. Reluctance
D. Eddy Currents

74. ECE Board Exam November 1995
A solid-state device which only gives a “1” output if all its inputs are also “1” is called
A. an AND gate
B. a NAND gate
C. a NOR gate
D. an OR gate

75. ECE Board Exam November 1995
How much is the resistance of Germanium slag 10 cm long and cross sectional area of 1 squared cm?
A. 5.5 k ohm
B. 550 k ohm
C. 55 k ohm
D. 550 ohm

76. ECE Board Exam November 1995
A _______ is a device which can test all pins of an IC at the same time.
A. logic probe
B. current tracer
C. logic clip
D. pulser

77. ECE Board Exam November 1995
Current carried by each of two long parallel conductors is doubled if their separation is also doubled, the force between them would
A. increase four-fold
B. become half
C. increase two-fold
D. remain the same

78. ECE Board Exam November 1995
What is the first stage in electronic troubleshooting?
A. Statistical analysis
B. Symptom analysis
C. Diagnostics
D. Initiate plate testing

79. ECE Board Exam November 1995
Circuit that transforms dc from one voltage level to another or from one frequency to another
A. Coupler
B. Clipper
C. Comparator
D. Converter

80. ECE Board Exam November 1995
______ is an orderly pattern of combined silicon atoms.
A. Covalent bond
B. Valence orbit
C. Semiconductor
D. Crystal

81. ECE Board Exam November 1995
A crystal with its major flat surfaces cut so that they are perpendicular to a mechanical axis of the original quartz crystal is called
A. a Y-cut crystal
B. a Z-cut crystal
C. an XY-cut crystal
D. an X-cut crystal

82. ECE Board Exam November 1995
A good material conductor should have _______ valence electrons.
A. 21
B. 1
C. 3.5
D. 10

83. ECE Board Exam November 1995
The objective of a capacitor is to
A. block AC and passes DC current
B. block DC and passes AC current
C. stores AC current
D. blocks AC current

84. ECE Board Exam November 1995
________ is the characteristic of an oscillator that enables it to sustain oscillation after removal of the control stimulus.
A. Momentum
B. Fly-wheel effect
C. Damping
D. Forced oscillations

85. ECE Board Exam November 1995
__________ is the term used to express the amount of electrical energy in an electrostatic field.
A. Coulombs
B. Watts
C. Volts
D. Joules

86. ECE Board Exam November 1995
______ is a device that stays on once triggered and stores one of two conditions as a digital circuit.
A. Gate
B. Latch
C. Integrator
D. Oscillator

87. ECE Board Exam November 1995
When the cells are in series, voltages add, while current capacity is ______.
A. the same as one cell
B. zero
C. infinite
D. the sum of each cell

88. ECE Board Exam November 1995
In shift registers made up of several flip-flops, the clock signal indicates ________.
A. a bit of information stored in the flip-flop
B. information of time
C. what time is it
D. when to shift a bit of data from input of the flip-flop to the output

89. ECE Board Exam November 1995
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”?
A. 5 %
B. 50 %
C. 8.33 %
D. 11.11 %

90. ECE Board Exam November 1995
Which of the following statements is correct?
A. Transistor has two terminals
B. Open resistor has small resistance
C. Typical power rating of a carbon-composition resistor ranged from 0.125 W to 2W
D. Potentiometer has two terminals

91. ECE Board Exam November 1995
__________ is the major characteristics of an IC
A. Complication
B. Size
C. Power consumption
D. Speed

92. ECE Board Exam November 1995
Find the sum of binary number 1010 and 0011.
a) 1021
b) 1101
c) 1011
d) 1111

93. ECE Board Exam November 1995
The loss of electrical energy in counter balancing the residual magnetism in each cycle is called
A. Eddy current loss
B. Hysteresis loss
C. Copper loss
D. Leakage loss

94. ECE Board Exam November 1995
In order to simplify a circuit, in analysis and computation the diode is normally assumed as _________
A. zero
B. ideal
C. imaginary
D. infinite

95. ECE Board Exam November 1995
Files in an E-mail communication are send thru _________
A. disk
B. mailbox
C. wires
D. attachment

96. ECE Board Exam November 1995
An audible tone generated by combining two different frequencies in a non-linear circuit or as sound waves in air is called
A. side tone
B. beat tone
C. heterodyne
D. deadbeat

97. ECE Board Exam November 1995
__________ are electrons at the outer shell.
A. Inside shell electrons
B. Conductor electrons
C. Outside shell electrons
D. Valence electrons

98. ECE Board Exam November 1995
Solve for flux density (in gauss) from a magnetic flux of 5,000 Mx through a perpendicular are of 2 cm x 5 cm.
A. 5000 G
B. 500 G
C. 10,000 G
D. 50 G

99. ECE Board Exam November 1995
Refers to the increased used of data conversion circuits as a result of increased application.
A. OP AMPS
B. Linear circuits
C. Computers
D. Digital equipment

100. ECE Board Exam November 1995
The decibel gain of cascaded amplifiers equals the
A. sum of voltage and current gains
B. product of individual gains
C. difference of individual gains

D. sum of individual gains



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