Electronic Test 3 Volume 1

1. What is the opposition to the creation of
magnetic lines of force?
A. Permeance
(B) Reluctance
C. Impedance
D. Elastance
2. If the value of the upper resistance limit of a
resistor is 10.5 Ω, what is its color coding.
A. Black, Brown, Brown, Gold
(B) Brown, Black, Black, Gold
C. Black, Blue, Brown, Gold
D. Brown, Black, Brown, Gold
3. Which of the following are the common uses
of zener diodes?
A. Rectifies
B. Switches
(C) Regulators
D. Amplifiers
4. If the current flows from positive to negative, it is
said to be a
(A) conventional current
B. drift current
C. convection current
D. an electron current
5. MOSPET and BJT are respectively controlled by
A. current and voltage
(B) voltage and current
C. both current
D. both voltage
6. ______is a current that flows in the core of a
transformer that produces heat.
A. Convention current
B. Conventional current
(C) Eddy current
D. Hysteresis
7. Which law determines the polarity of induced
voltage?
A. Ohm’s law
B. Coulomb’s law
C. Joule’s law
(D) Lenz’s law
8. DIAC is another term for a
A. two-layer diode
B. three-layer diode
(C) four-layer diode
D. five-layer diode
9. _______ are the particles that make up the
lattice in an ionic crystal.
(A) Ions
B. Protons
C. Electrons
D. Positrons
10. What is the measure of the consistency or
repeatability of measurement?
A. Error
B Accuracy
(C)Precision
D. Exactness
11. What should be used to clean a dirty tape
head?
A. Oil
B. Ferric chloride solution
(C) Isopropyl alcohol
D. Water
12. What is the property of a magnetic material
which retains magnetism even after the
withdrawal of magnetizing force?
A. Permeability
B. Permittivity
C. Reluctivity
(D) Retentivity
13. A power found by multiplying the sine of the
phase angle, the effective source voltage and
the effective source current.
A. Real power
B. Apparent power
(C) Reactive power
D. Dissipated power
14. Which is the maximum efficiency of half wave
Rectification?
A. 76 %
(B) 41 %
C. 82 %
D. 33 %
15. A characteristic of a cascaded amplifier.
(A) Overall gain is increased.
B. Overall gains is doubled.
C. Overall gain is multiplied.
D. Overall gain is decreased.



16. When a diac is added with one more
Terminal, it becomes
A. an SCR
(B) a triac
C. a thyristor
D. a quadric
17. ______is defined as the ration of required
input signal to the amount of deflection.
A.Viscousity
B. Relatively
(C) Sensitivity
D. Fidelity
18. What is the lagging effect between flux
density of the material and the magnetizing
force applied?
A. Magnetization
B. Retentivity
(C) Hysteresis
D. Reluctivity
19. Crystal have very
A. low quality factor
(B) high quality factor
C. low resistance
D. high resistance
20. Silicon resistivity is about
A. 100 Ω -mm
(B) 100 Ω -cm
C. 100 Ω -m
D. 100 Ω -dm
21. Refreshing is the periodic charging of a
______ cell.
A. solar
(B) dynamic
C. static
D. photovoltaic
22. ______is an emf induced when a conductor
is stationary and the magnetic field is moving
or changing.
A. Self-induced emf
B. Dynamically induced emf
C. Mutually induced emf
(D) Statically induced emf

23. Is a term used to express the ration of change
in the dc collector current to the change in the
base current in a bipolar transistor.
(A) Beta
B. Gamma
C. Alpha
D. Delta
24. What gaseous tube which uses a pool of
liquid mercury as its cathode?
A. Klystron
B. TWT
C. Thyratron
(D) Phanotron
25. What element whose nuclei contains the
Most tightly bound nucleons?
(A) Iron
B. Copper
C. Helium
D. Hydrogen
26. What is the unit of reluctance?
A. Oersted
B. Gilbert
(C) At/Wb
D. Maxwell
27. _______ is the emission of electrons from hot
bodies.
(A) Edison effect
B. Radiation effect
C. Hall effect
D. Peltier effect
28. A diagram showing procedures which are
Followed and acted upon.
A. Block diagram
B. Schematic diagram
C. Algorithm
(D) Flow chart
29. What is the simplest and commonly used
method to switch off an SCR?
A. Reverse gate voltage application
B. Forced-commutation technique
(C) Anode-current interruption
D. Forward gate voltage application

30. Positive feedback
(A) increases gain and distortion
B. increases bandwidth
C. reduces distortion
D. reduces gain

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

Electronic Test 1 Volume 1

1. What term refers to the energy stored in an
electromagnetic or electrostatic field?.
A. Joule – Coulomb
B. Ampere – Joule
C.Kinetic energy
D.Potential energy *
2. Parallel cells have the same voltages as one
cell but have
A. less current capacity
B. unstable resistance
C. different current capacity *
D. fluctuating power output.
3. The relative permeability of paramagnetic
Substance is
A. a little greater than 1 *
B. equal to 1
C. much greater than 1
D. much less than 1
4. Known as the reciprocal of capacitance.
A. Elastance *
B. Conductance
C. Permeability
D. Permittivity
5. A phenomenon whereby substance attracts
pieces of iron.
A. Electromagnetism
B. Naturalism
C. Magnetism *
D. Coulomb’s Law
6. Materials with permeabilities slightly less than
that of free space are referred to as
A. non – magnetic
B. paramagnetic
C. ferromagnetic
D. diamagnetic *
7. What do you call the process of converting an
AC input to a DC output?
A. Alteration
B. Variation
C. Rectification *
D. Radiation

8. What transistor in which n-type and p-type
materials are used?
A. FET
B. BJT *
C. UJT
D. TTL
9. _______ is the concept whereby a small
voltage is generated by a conductor with
current in an external magnetic field.
A. Flywheel effect
B. Magnetic effect
C. Hall effect *
D. Skin effect
10. What is the output voltage of a carbon-zinc
cell?
A. 2.5 V
B. 3.5 V
C. 1.5 V *
D. 0.5 V
11. With a single decimal digit, the highest count
Possible is
A. 7
B. 8
C. 9 *
D. 10
12. Electric power refers to
A. joule
B. volt-ampere *
C. volt-coulomb
D. watt-second
13. Determine how long a battery will last whose
rating is 100 AhL; 24 volts and will run 300
watts electroni equipment and 50 watts light.
A. 26.65 hours
B. 6.85 hours *
C. 50.05 hours
D. 12.00 hours
14. How does an ohmmeter behave if its positive
lead is connected to cathode of a diode while
negative to anode?
A. Has decreasing resistance
B. Has infinite high resistance *
C. Has unstable resistance
D. Has very low resistance
15. ______ are individual points graphic
display.
A. Resolution
B. Columns
C. Rows
D. Pixels *
16. Which of the following equipment is used to
determine location in terms of coordinate, this
is now widely used in modern communications?
A. Bearing meter
B. Hydrometer
C. Altimeter
D. Global Positioning System (GPS) *
17. Identify from the following statements that
does not refer to the use of signal generator
when testing a receiver out of generating
either modulated or un modulated signal.
A. Testing of receiver performance
B. receiver alignment
C. receiver servicing
D. Display of voltage or current graphs *
18. A conductor behaves as ______ at absolute
zero temperature.
A. a conductor
B. a variable resistor
C. a super – conductor *
D. an insulator
19. Which are the three terminals of a bipolar
transistor?
A. Base, collector and emitter *
B. Gate, source and sink
C. Input, output and group
D. Cathode, plate and grid
20. One disadvantage of a dynamic RAM is a
result of the need for
A. high voltage
B. blowing fuse
C. refreshing
D. complementing *
21. What is the output voltage of a silver
cadmium cell?
A. 1.5 V
B. 1.1 V *
C. 0.8 V
D. 3.0 V
22. Which of the following dry cells has the
largest height?
A. D *
B. C
C. AAA
D. AA

23. Ohm’s law is applicable to ______circuit.
A. trivalent
B. unilateral
C. linear *
D. exponential
24. Dynamic memory stores information
A. as long as power is applied and the
memory is refreshed *
B. when power is applied at regular intervals
C. as long as power is applied to the memory
D. even the power is not applied to the memory
25. What is the program used to enter a program
into the computer memory?
A. Subroutine
B. Complier
C. Assembler
D. Loader *