|ECE Board Exam Reviewer|
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
D. static charge
53. ECE Board Exam November 1995
The first recipient in E-mail communication.
B. Mail box
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).
C. Input code
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.
B. SOS memory
D. Hard Memory
58. ECE Board Exam November 1995
_________ is an excess property of P-type semiconductor.
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.
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
D. Motor boating
63. ECE Board Exam November 1995
The longer the diameter of a wire, the __________ is its resistance.
64. ECE Board Exam November 1995
When an atom gains an additional ______, it results to a negative ion.
65. ECE Board Exam November 1995
_______ refers to circuits with 10 to 100 integrated circuits.
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
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.
B. op amp
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?
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.
73. ECE Board Exam November 1995
What is the lagging effect between the magnetizing force applied and the flux density?
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
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
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
80. ECE Board Exam November 1995
______ is an orderly pattern of combined silicon atoms.
A. Covalent bond
B. Valence orbit
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.
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.
B. Fly-wheel effect
D. Forced oscillations
85. ECE Board Exam November 1995
__________ is the term used to express the amount of electrical energy in an electrostatic field.
86. ECE Board Exam November 1995
______ is a device that stays on once triggered and stores one of two conditions as a digital circuit.
87. ECE Board Exam November 1995
When the cells are in series, voltages add, while current capacity is ______.
A. the same as one cell
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
C. Power consumption
92. ECE Board Exam November 1995
Find the sum of binary number 1010 and 0011.
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 _________
95. ECE Board Exam November 1995
Files in an E-mail communication are send thru _________
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
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
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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