Electronic Test 4 Volume 1

1. What substance in its crystalline form is used in oscillators?
A. Silicon
B. Germanium
C. Sapphire
(D) Quarts
2. A decade counter digital IC has how many states?
A. 6
B. 15
(C) 10
D. 20
3. What are the two primary classification of zener diode?
A. Hot carrier and tunnel
B. Varactor and rectifying
C. Forward and reversed biased
(D) Voltage regulator and voltage reference
4. What type of a diode is made of a metal whisker touching a very small
Semiconductor die?
(A) Point contact
B. Zener diode
C. Varactor diode
D. Junction diode
5. A permanent magnet does not exert a force on
A. an unmagnetized iron bar
B. a magnetized iron bar
(C) a stationary electric charge
D. a moving electric charge
6. The transistor common-base amplifier is similar to the vaccum tube
A. cathode-follower amplifier
B. video amplifier
(C) grounded-grip amplifier
D. audio amplifier
7. A safety rule to remember when soldering or desoldering.
A. Make sure the power is disconnected
B. Make sure not to use a soldering iron that emits huge transient voltage
(C) Make sure you use a low wattage soldering iron.
D. None of these.
8. What happens to the conductivity of a semiconductor junction
when it is illuminated?
A. It stays the same.
(B) It increases.
C. It becomes temperature dependent.
D. It decreases.
9. The emf produced in a wire by its motion
Across a magnetic field does not depend on
(A) the diameter of the wire
B. the length of the wire.
C. the orientation of the wire.
D. the flux density of the field.
10. An instrument often used to check the degree
Of motor shaft misalignment is the
A. voltmeter
B. clamp-on ammeter
C. growler
(D) dial indicator
11. The necessary probe commonly used on the oscilloscope when
Measuring high frequency or high impedance circuits is the
A. demodulator probe
(B) low-capacitance probe
C. voltage divider
D. noise probe
12. What are the advantages of using LED?
(A) Low-power consumption and long life
B. High lumens per cm per cm and low-power consumption
C. High lumens per cm per cm low-voltage requirement
D. Current flows when the device is exposed to
a light source.
13. What is the term for an out-of-phase, nonproductive power
associated with inductors and capacitors?
(A) Reactive power
B. Effective power
C. True power
D. Peak envelope power
14. What is a bistable multivibrator circuit?
A. An AND gate
B. An OR gate
C. A clock
(D) A flip-flop
15. The device used to attenuate specific signals is the
A. drop tap
B. line tap off
C. splitter
(D) trap
16. The device that is used to prevent signals from feeding
Back up the transmission line is the
A. trap
(B) terminating resistor
C. line trap
D. preamplifier
17. The meter often used in testing an armature for
short circuit.
A. VOM
B. VTVM
(C) Growler
D. Short circuit meter
18. High or erratic plate grid current readings in an RF
amplifier may be caused by
A. a shifted power supply
(B) parasitic oscillations
C. the used of dynamometers
D. run-down batteries
19. A microprocessor is
A. another name of a computer
B. a name for a calculator chip
(C) a CPU integrated circuit
D. a small scale integrated circuit
20. The device used to pull wire through a conduit
is called
(A) fish tape
B. wire tongs
C. straps
D. connectors
21. Solder is
(A) 40 % lead, 60 % tin
B. 70 % lead, 30 % tin
C. 50 % lead, 50 % tin
D. 60 % lead, 40 % tin
22. Which electrode of a triode tube can be compared
with the collector region of a bipolar transistor?
A. Control grid
B. Cathode
(C) Plate
D. Filament
23. The device used to control a motor from a distance
location is the
(A) magnetic controller
B. manual starter
C. drum switch
D. snap switch
24. Which type of FET has no channel when Vgs = 0 V.
A. MISFET
B. MOSFET depletion type
(C) MOSFET enchancement type
D. VFET
25. A hard tube is defined as a tube with
A. a tungsten filament
B. a metal envelope
C. a gas in the envelope
(D) no gas in the envelope