Practice Test GeeksCAT - Certified Aerospace Technician Practice Test
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Avionics and Electrical Systems Flashcards

7 cards from real CAT 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 and Electrical Systems flashcards as text

  1. What is the primary function of an aircraft Auxiliary Power Unit (APU)?

    Answer: Supply electrical power and bleed air when main engines are not running

    The APU provides electrical power and pneumatic bleed air for engine starting and environmental control when main engines are shut down.

  2. In avionics maintenance, what does the acronym BITE stand for?

    Answer: Built-In Test Equipment

    BITE (Built-In Test Equipment) refers to self-diagnostic hardware and software integrated into avionics units to detect and report system faults.

  3. Which wire insulation material is most commonly used in aircraft applications for its high-temperature resistance and low flammability?

    Answer: PTFE (Polytetrafluoroethylene/Teflon)

    PTFE (Teflon) is preferred in aircraft wiring due to its excellent temperature resistance, chemical inertness, and low flammability under aerospace conditions.

  4. What is the function of a Bus Tie Breaker (BTB) in an aircraft AC electrical system?

    Answer: Interconnect multiple AC buses or isolate a faulted bus from the network

    Bus Tie Breakers allow power sharing between generators by connecting buses together or isolate a faulted bus to protect the remaining healthy electrical network.

  5. Which avionics system specifically warns flight crews of potential Controlled Flight Into Terrain (CFIT)?

    Answer: TAWS/GPWS (Terrain Awareness and Warning System / Ground Proximity Warning System)

    TAWS/GPWS monitors aircraft altitude, terrain proximity, and flight path geometry to alert crews before potential ground impact.

  6. What does the military specification MIL-W-22759 govern in aerospace applications?

    Answer: Flexible hookup wire for aerospace and military use

    MIL-W-22759 specifies flexible hookup wire for aerospace use, typically with PTFE or ETFE insulation, rated for high temperature and harsh environments.

  7. What does Fly-by-Wire (FBW) technology replace in conventional aircraft flight control systems?

    Answer: Mechanical cables and linkages with electronic signal transmission to actuators

    Fly-by-Wire replaces traditional mechanical push-pull rods and cables with electronic control signals transmitted by wire to electrically-commanded hydraulic or electric actuators.