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


1. To generate pulsating DC voltage, what equipment is used?

sweep generator
signal generator
oscillator
none of the above

2. The interference brought about by the resultant signal from addition and subtraction of two or more signals is called

intermodulation
co-channel
adjacent channel
none of the above

3. Give the decimal equivalent of microfarad

0.001 F
0.000,000,001 F
0.000,001 F
none of the above

4. What is the unit of impedance

siemens
ohm
watt
ampere

5. What is the unit of battery capacity

ohms
siemens
ampere-hour
none of the above

6. What is the unit of admittance

siemens
watt
ohms
inductance

7. What is the frequency comprising the extrahigh frequency (EHF)

30 MHz to 300 MHz
300 MHz to 3 GHz
3 GHz to 30 GHz
30 GHz to 300 GHz

8. The location of an interfering station can be pinpointed by using direction finders and utilizing

triangulation

stimulation
intermodulation
topography

9. What instrument is used for monitoring relative RF output during the transmitter and antenna adjustment

frequency counter
grid-dip meter
frequency monitor
none of the above

10. Signal generator is designed to produce

range of frequencies in the AF and RF bands
multiple power output
multiple modulation of modes
none of the above

11. No. 11 copper wire has a resistance of 0.28 ohms per meter. What is the resistance of 6 kms of this wire.

168 ohm
1.68 kiloohm
16.8 kiloohm
none of the above

12. If the transmitter J output is not matched with the antenna, what must be the effect aside from reduced power?

higher ERP
radiation of harmonic frequencies
low VSWR
none of the above

13. Parallel conductive plates with dielectric in between are the component parts of

resistor
inductor
transistor
capacitor

14. What is used to connect a balanced line to an unbalanced line?

balun
coupler
mixer
switch

15. To effect maximum transfer of power from the final output stage of a transmitter to the antenna, there must be

good impedance matching
high VSWR
high reflection coefficient
characteristic impedance

16. Ten times the logarithm of the ratio of the output power to the input power is

power gain
decibel
figure of merit
quality factor

17. A resonant circuit has

equal reactance
equal resistance
matched output
none of the above

18. A voltage standing wave ratio of an antenna is measured with

oscilloscope
spectrum analyzer
a SWR meter
field strength meter

19. Four cells, each with an EMF of 1.4 and an internal resistance of 0.4 ohm, are connected in series, and a resistance of 4.0 ohms is connected across the group. How much current flows in the circuit?

0.4 A
0.5 A
1.0 A
none of the above

20. What is the approximate magnitude of the impedance of a series RLC circuit at resonance?

low
high
infinite
none of the above


21
. What is the unit of conductance

siemens
coulumb
henry
ohm


22
. A voltmeter connected across a resistance reads 56 volts, and an ammeter connected in series with the resistance reads 0.4 ampere. What is the value of resistance?

14 ohms
140 ohms
22.4 ohms
none of the above


23
. The two tone test is used in SSB transmitter to

simulate speech signal
increase signal
produce AC signal
none of the above


24
. What instrument is used to measure resistance with value of less than one ohm?

multimeter
ohmmeter
RLC meter
wheatstone bridge


25
. The symbol "X" represents what quantity?

inductance
capacitance
resistance
reactance


Score = 

Correct answers: