AET Avionics Systems 4

Question 1

What is the purpose of the Aircraft Communications Addressing and Reporting System (ACARS)?

Accepted Answer

Transmit digital data messages between aircraft and ground stations

Answer

ACARS is a digital datalink system that transmits short messages between aircraft and airline operations or ATC ground stations.

Question 2

In avionics, what does 'LRU' stand for?

Accepted Answer

Line Replaceable Unit

Answer

LRU stands for Line Replaceable Unit, a modular avionics component designed for quick replacement on the flight line without depot-level maintenance.

Question 3

Which system provides accurate altitude information by measuring atmospheric pressure?

Accepted Answer

Air Data Computer (ADC)

Answer

The Air Data Computer (ADC) converts static pressure measurements from pitot-static probes into calibrated altitude, airspeed, and Mach data.

Question 4

What is the function of a Flight Data Recorder (FDR) mandatory parameter — 'pitch attitude'?

Accepted Answer

Record nose-up or nose-down aircraft rotation about the lateral axis

Answer

Pitch attitude records rotation about the lateral (wing-to-wing) axis, indicating nose-up or nose-down orientation during flight.

Question 5

What technology does ADS-B use to broadcast an aircraft's position?

Accepted Answer

GPS-derived position transmitted via 1090 MHz transponder

Answer

ADS-B Out uses GPS position data broadcast autonomously on 1090 MHz via Mode S transponder without requiring radar interrogation.

(AET) Aircraft Electronics Technician Practice Test