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


1. High Frequency (HF) covers the frequency range of

300 - 300 KHz
300 KHz - 3 MHz
3 MHz - 30 MHz
30 MHz - 300 MHz

2. Very High Frequency (VHF) covers the frequency range of

300 - 300 KHz
3 MHz - 30 MHz
30 MHz - 300 MHz

300 MHz - 3 GHz

3. Ultra High Frequency (UHF) covers the frequency range of

3 MHz - 30 MHz
300 - 300 KHz
300 MHz - 3 GHz
30 MHz - 300 MHz

4. Medium Frequency (MF) covers the frequency range of

3 MHz - 30 MHz
300 KHz - 300 KHz
3 MHz - 30 MHz
300 MHz - 3 GHz

5. Class A amplifier is

high fidelity
high efficiency
biased at cut-off
none of the above


6. Class B amplifier is

high efficiency
biased at cut-off
high fidelity
none of the above

7. Class C amplifier is

high efficiency
high fidelity
biased at cut-off
none of the above

8. Final amplifier is in a

stage in microwave transmitter where there is a klystron tube

driver stage
tuner stage
automatic gain control stage

9. What would prevent thermal runaway of transistor amplifier,

low current use
control high temperature
bias stabilization application
forward biasing

10. What is used as a transmission channel between the antenna and the transmitter?

coaxial cable
optic fiber
helical cable
waveguide

11. Beyond the horizon propagation is also known as,

ionospheric
troposcatter
high frequency
medium frequency propagation

12. Standard Broadcast station (AM) uses this tupe of propagation for most its signals

groundwave
spacewave
skywave
troposcatter propagation

13. One of these is not a hertz type antenna

yagi
dipole
whip
AM broadcast tower antenna

14. The main LC oscillators are the Hartley and

tuned
sinusoidal
colpitts
crystal oscillators

15. The angle between the half-power radiation points of an antenna is,

critical angle
refraction angle
elevation angle
beamwidth

16. Antenna gains are measured with reference to

angle of refraction
elevation angle
isotropic radiator
reflector

17. The product of power fed to the antenna and its power gain is,

peak to peak
peak envelope
average peak power
effective radiated power

18. Field strength of radiated waves is expressed in,

volts per meter
watts per meter
volts
watts

19. Sun-spot cycle refers to the sun's temperature that varies and causing variations in the coupler. It occurs normally every,

10th year
11th year
12th year
13th year

20. What is the highest radio frequency that will be refracted back to earth called,

optimal frequency
maximum frequency traffic
maximum usable frequency
critical frequency


21
. HF utilizes what type of propagation?

ground wave
sky wave
space wave
direct wave


22
. Grounded antennas are known as,

yagi
dipole
marconi
hertz


23
.Satellites that is placed at the equatorial orbit are,

low orbit satellite
random path satellite
geostationary satellite
earth orbit satellite


24
. In AM, the ratio of the modulating voltage over the carrier voltage is known as,

deviation constant
deviation index
modulation index
modulation constant


25
. A3 emission means that the carrier is,

modulated by data
amplitude modulated by voice
frequency modulated by voice
keyed


Score = 

Correct answers: