8.
Antenna equipment RC-292 is a--
a.
half-wave antenna.
b.
horizontal antenna.
c.
modified ground-plane antenna.
d.
a highly directional antenna.
9.
No antenna should be erected closer than _______ times its height from
power lines.
a.
five
b.
four
c.
three
d.
two
10. A 20-meter coaxial cable is used as the transmission line for the--
a.
antenna
equipment RC-292.
b.
antenna
AT-984A/G.
c.
antenna
group AN/GRA-50.
d.
antenna
group OE-254/GRC.
11. The vehicle-mounted, whip antenna is a ____________-wave antenna.
a.
quarter
b.
half
c.
three-quarter
d.
full
12. A wavelength is the distance in meters traveled by a wave during a
time interval of--
a.
one second.
b.
a few seconds.
c.
one-half cycle.
d.
one complete cycle.
13. The transmitting antenna of a radio set broadcasts radio frequency
waves which are made up of two fields of force.
The field which
transmits the signal is the--
a.
b.
c.
electrical field.
d.
14. The purpose of grounding a quarter-wave antenna is to--
a.
provide stability for the antenna mount.
b.
decrease the power demand on the transmitter.
c.
reduce excessive voltage at the antenna.
d.
give it the electrical length of a half-wave antenna.
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