AET Communication Systems 3

Question 1

What is the primary function of an audio control panel (ACP) in an aircraft?

Accepted Answer

Select and route audio between radios, navigation receivers, and crew headsets

Answer

The Audio Control Panel allows crew members to select which radio or nav receiver audio they hear and which microphone/radio they transmit on.

Question 2

What does ACARS stand for?

Accepted Answer

Aircraft Communication Addressing and Reporting System

Answer

ACARS (Aircraft Communication Addressing and Reporting System) is a digital datalink system for transmitting short messages between aircraft and ground stations.

Question 3

What frequency does the emergency guard channel operate on in aviation?

Accepted Answer

121.5 MHz

Answer

121.5 MHz is the international aviation emergency (guard) frequency monitored continuously by ATC and rescue services.

Question 4

What is the impedance of a standard aviation VHF antenna system?

Accepted Answer

50Ω

Answer

Aviation VHF antenna systems are designed for 50-ohm impedance to match standard coaxial cables and transceiver output stages.

Question 5

In aircraft interphone systems, what is the purpose of a hot microphone (hot mic) mode?

Accepted Answer

Allow continuous open-mic communication without PTT

Answer

Hot microphone mode keeps the microphone continuously active so crew can communicate hands-free without pressing the push-to-talk switch.

AET - Avionics Electronic Technicians Practice Test

AET - Avionics Electronic Technicians Practice Test

AET Communication Systems 3