LESSON 1
PRACTICE EXERCISE
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 correct letter in the subcourse booklet.
1.
Every communication circuit suffers
from the effects of noise,
interference, distortion, and attenuation.
Good communication quality is
indicated by the absence of
a. distortion, noise, and attenuation.
b. interference, distortion, and noise.
c. noise, attenuation, and interference.
d. attenuation, interference, and distortion.
2.
Technicians use the term "white" noise to differentiate its effects
from the effects of other noise types.
White noise results from the
cumulative effects of
a. impulse, thermal, and cosmic noise.
b. cosmic, atmospheric, and impulse noise.
c. thermal, cosmic, and atmospheric noise.
d. atmospheric, impulse, and thermal noise.
3.
The signal-to-noise ratio, total noise, signal power, and amplifier
gain have their effects on the reliability of communication. The limiting
factor of reliability is the
a. signal-to-noise ratio.
b. amplifier gain.
c. signal power.
d. total noise.
21
Previous Page
