AMATEUR RADIO CLASS "C" EXAMINATION
ELEMENT VI
PREPARED BY: HOMER M. ALBUFERA, 4F1KYW


1. The three basic parts of a transistors are the base, the collector and the,

cathode
anode
emitter
bias

2. The two very useful semi-conductors are germanium and,

diamond
tungsten
silicon
arsenic

3. A varactor is

negative bias diode
variable capacitance diode
avalance diode
reverse polarity diode

4. The minority carrier in a P-type semi-conductor is

electrons
holes
neutrons
protons

5.The majority carrier in a N-type semi-conductor is


electrons
holes
neutrons
protons


6. The majority carrier in a P-type semi-conductor is

electrons
holes
neutrons
protons

7. Zener diodes are diodes,

which has negative polarity
has variable capacitance diode
that operate on its avalanche voltage
negative biased diodes

8. The ratio of collector current to the base current of a transistor is,r

alpha

gamma
mu
beta

9. The greatest advantage of transistor over a vacuum tube is,

cost
efficiency
size
availability

10.Commonly used diode as RF switch,

zener
pin
varactor
tunnel diode

11. The three terminals of a silicon controlled rectifier (SCR) are the anode, cathode,

emitter
collector
base
gate

12. Type of diodes normally used in voltage regulator circuits

zener
pin
tunnel
varactor

13. What is the forward resistance of an ideal diode

very large value
infinity
unity
zero

14. What diode has a negative resistance,

zener
pin
tunnel
varactor

15. A vacuum tube having a filament, a cathode and anode is,

diode
triode
tetrode
pentode

16. A vacuum tube having a filament, a cathode, anode and control grid is,

diode
triode
tetrode
pentode

17. Reyleight fading occurs several times per minute during,

groundwave
skywave
troposcatter
ionospheric propagation

18. Two inductors valued at 20 henry and 60 henry respectively are connected in parallel. What is the total equivalent inductance?

80 henry
30 henry
15 henry
5 henry

19. Two capacitor valued at 40 uF and 60 uF are connected in series, the total equivalent capacitance is,

100 uF
20 uF
7.5 uF
24 uF

20. The beta of a transistor is its,

plate resistance of the transistor
current amplification factor
transconductance
mutual conductance


21
. The sub-harmonic of 1,000 KHz is,

2,000 KHz
3,000 KHz
4,000 KHz
500 KHz


22
. A conductive circuit pattern applied to one or both sides of an insulating substrate is known as,

IC's
FET's
printed circuit
micro processors


23
. 3 db points are also known as,

full power points
half-power points
maximum power points
minimum power points


24
. What is the capacitive reactance of a capacitor whose value is 350 pf, operating on frequency 1,200 KHz?

379 ohms
1,570 ohms
157 ohms
950 ohms


25
.A series circuit consists of an inductance of 500 uH and a capacitance of 400 pF. What is the resonant frequency?

20 KHz
900 KHz
356 KHz
100 KHz


Score = 

Correct answers: