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