Practice Test Geeks(AET) Aircraft Electronics Technician Practice Test
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Avionics Systems Flashcards

7 cards from real AET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Avionics Systems flashcards as text

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

    Answer: Transmit digital data messages between aircraft and ground stations

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

  2. In avionics, what does 'LRU' stand for?

    Answer: Line Replaceable Unit

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

  3. Which system provides accurate altitude information by measuring atmospheric pressure?

    Answer: Air Data Computer (ADC)

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

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

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

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

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

    Answer: GPS-derived position transmitted via 1090 MHz transponder

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

  6. Which of the following correctly describes a Cockpit Voice Recorder (CVR) recording duration requirement under current FAA regulations for newly certified transport aircraft?

    Answer: 2 hours

    Current FAA regulations require CVRs on newly certified transport category aircraft to retain the last 2 hours of audio.

  7. What is the role of a Distance Measuring Equipment (DME) transponder ground station?

    Answer: Reply to aircraft interrogation pulses to allow slant-range distance computation

    The DME ground transponder receives interrogation pulses from the aircraft, replies after a fixed delay, and the aircraft computes slant-range distance from the round-trip time.