Communications Course 01 Annex b Exam
ACTUAL QUESTIONS AND CORRECT
ANSWERS
MOS 0621 - CORRECT ANSWER Radio Field Operator; Maintains, installs, operates PRC-
142C
Define: Wave Motion - CORRECT ANSWER Recurring disturbance that moves through space
without a medium
Define: Ionospheric Variations - CORRECT ANSWER Changes in ion density that affect radio
waves
Types of Ionospheric Variations - CORRECT ANSWER Regular (daily, seasonal, 27 day, 11
year)
Irregular (Sudden ionospheric disturbance, sporadic E layer, Nuclear detonation)
Define: TPI - CORRECT ANSWER Two person integrity. Used to prevent single person access
to comsec material
Role of a transmission Marine - CORRECT ANSWER Support C2 Command and center for
commander
Install, operate, and maintain transmission equipment
Provide Reliable, flexible high capacity transmission parts for MAGTF networks
Utilize wireless technology to carry info to a distant end
Wave Propogation - CORRECT ANSWER Movement through a medium
Two variations (Groundwave/Skywave)