Electronic Test 2 Volume 1

1. Periodically recharging a dynamic cell capacitance is called
(A) refreshing
B. retrieving
C. string
D. charging
2. What is the special program outside the normal instruction sequence?
A. Addroutine
(B) Subroutine
C. Subprogram
D. Sub- instruction
3. A solid-state logical device which only gives a “1” output if all inputs are “0” is called
A ___ gate.
(A) NOR
B. NAND
C. NOT
D. OR
4. An insulating element or material has capability of
A. storing high currents
(B) preventing short circuit between two conducting wires
C. storing voltage
D. conducting large current
5. Which of the following refers to the point
where the intensity of magnetic line of force is
maximum?
A. North pole
(B) Magnetic pole
C. Weak pole
D. Great circle
6. How do you describe materials whose permeabilities
are a little greater than that of free space?
A. Diamagnetic
B. Non-magnetic
(C) Paragmatic
D. Ferromagnetic
7. The anode of a semiconductor diode indicates
a _____ charge during conduction.
A. either depending on design
B. neutral
C. negative
(D) positive
8. Which LED color is mostly available?
A. White
B. Green
C. Blue
(D) Red

9. A radio equipment will be used 70% at 50 amperes
rating for 5 hours, how much capacity of a dry battery
is needed?
A. 250 Ah
(B) 175 Ah
C. 35 Ah
D. 17.5 Ah
10. If 2 V is applied to a 20dB attenuator the
level will be
A. 10 V
B. 5 V
(C) 200mV
D. 0.02 V
11. A T-section which has inductance only in the
series arms and capacitance only in the
parallel branch.
A. High-pass filter
B. Bandpass filter
(C) Low-pass filter
D. Bandstop filter
12. The response of the filter is plotted in __ in a Bode plot.
A. radians
B. siemens
C. watts
(D) decibels
13. When a piezoelectric crystal is mechanically deformed,
(A) voltages are produced
B. the resistance across the faces is zero
C. it is ruined
D. the crystal warranty is invalidated
14. A SAW device has electrodes that are described as
A. silicon-on- substance
B. polyoxidized epitaxial wafer
C. micrometer siliconite
(D) interdigital
15. The processing of a number sequence is the method used in
A. logic gates
(B) digital filters
C. modems
D. random memory
16. The minimum ampere capacity panel box used today is
A. 30
B. 60
C. 150
(D) 100
17. Which meter uses a dual triode tube and requires external power
for operation?
A. TVM
B. VOM
(C) VTVM
D. None of these
18. A haft wave rectifier circuit utilizing one half of an a-c input cycle has a ripple
frequency in its output equivalent to
A. 120 cps
B. 110 cps
(C) 60 cps
D. 240 cps
19. Find the power across the resistor of 5 ohms delivered from a battery of an
internal resistance of 3 ohms and a constant emf of 4 volts.
(A) 1.25 watts
B. 1.2 watts
C. 10 watts
D. 0.6 watts
20. CMOS stands for
A. Common Mode Oscillating System
B. Complementary Mica-Oxide Silicon
(C) Complementary Metal-Oxide Semiconductor
D. Complementary Metal-oxide Substrate
21. The name of the field-effect transistor designed to work as a power amplifier.
A. JFET
(B) VFET
C. MOSFET
D. MESFET
22. How do zener diodes widely used?
A. Current limiters
B. Variable resistors
C. Power collectors
(D) Voltage regulators
23. What is multi-wire connection between digital circuits?
A. Mutiplexed cable
B. Cable ribbon
C. Wire tap
(D) Bus
24. The region in electronic transistor that is very lightly doped and very thin is
referred to as the
A. collector
B. emitter
C. collector-base
(D) base
25. How many symbols are used in octal number system?
A. 2
B. 4
(C) 8
D. 16
26. Which is not a part of CRT in oscilloscopes?
A. Aquadag coating
B. Deflecting plate
(C) Digital panel meter
D. Electron gun
27. The reading on a watt-hour meter is actually a measure of
A. power
(B) energy
C. time
D. temperature
28. How many silver zinc cells in series are needed for a 9 V battery?
A. 7
B. 9
(C) 6
D. 3
29. Which semiconductor material is commonly used the construction of LED?
A. Silicon (Si)
B. Germanium (Ge)
(C) Gallium Arsenide (Ga As)
D. Gallium (Ga)
30. The circulating or fly-wheel current in a tank circuit recreates the sinusoidal
voltage waveform in
(A). class C RF power amplifiers
B. class A audio amplifiers
C. class AB audio amplifiers
D. phase inverters