LESSON EXERCISES
In each of the following exercises, select the ONE answer that BEST completes
the statement or answers the question.
Indicate your solution by circling the
letter opposite the correct answer in the subcourse booklet.
1.
The speed at which a radio wave travels through space is approximately
a.
186,000 miles per second.
b.
300,000 miles per second.
c.
186,000,000 miles per minute.
d.
300,000,000 miles per minute.
2. What is the wavelength of a radio wave when the output frequency of the
radio is 3 MHz?
a.
100 meters
c.
3,00 meters
b.
1,000 meters
d.
3,000,000 meters
3.
Most tactical radios operate in a frequency range from approximately
a.
16 Hz to 16 kHz.
c.
1.5 MHz to 400 MHz.
b.
16 kHz to 400 MHz.
d.
300 MHz to 3,000 MHz.
4.
A vertical antenna that uses the earth as one-half of its length is known
as a
a.
dipole.
c.
half-wave antenna.
b.
full-wave antenna.
d.
quarter-wave antenna.
5. What method should you
use
to
stabilize
the
frequency
of
the
CW
transmitter shown in figure 2-7?
a.
Key the oscillator.
b.
Use a large antenna.
c.
Key the power amplifier.
d.
Operate in a high-frequency band.
6. Frequency stabilization in the AM radiotelephone transmitter in figure 2-
9 is accomplished by
309 L2
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