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 function of a Constant Current Regulator (CCR) used in aircraft runway lighting circuits?

    Answer: Maintain steady current through series-connected lamp circuits regardless of lamp count

    A CCR regulates current (not voltage) in series-connected airfield lighting circuits so that all lamps receive consistent brightness even as individual lamps burn out.

  2. MIL-DTL-38999 circular electrical connectors used in aerospace applications feature which type of coupling mechanism?

    Answer: Threaded screw-type coupling

    MIL-DTL-38999 connectors use threaded coupling that provides a vibration-resistant, secure mating suitable for harsh aerospace and military environments.

  3. What is the primary purpose of electrical bonding between aircraft structural components?

    Answer: Establish low-resistance electrical paths to equalize potential and provide a common ground

    Bonding creates low-resistance connections between structural members to prevent static charge buildup, reduce electromagnetic interference, and establish a reliable ground reference.

  4. Which FAA regulation and advisory circular specifically governs Electrical Wiring Interconnection System (EWIS) installation requirements for transport category aircraft?

    Answer: FAR Part 25 / AC 25.1701

    FAR Part 25 Subpart H (§25.1701–25.1733) and AC 25.1701 establish comprehensive EWIS design, installation, and maintenance requirements for transport category aircraft.

  5. What is 'crosstalk' in the context of aircraft avionics wiring and signal integrity?

    Answer: Unintended electromagnetic coupling between adjacent signal paths causing interference

    Crosstalk is unintended electromagnetic energy transfer between adjacent wire bundles or signal traces that can corrupt avionics data or degrade signal quality.

  6. Which test instrument should an aerospace technician use to measure the insulation resistance of aircraft wiring in megohms?

    Answer: Megohmmeter (Megger)

    A megohmmeter applies a high test voltage (typically 500V or 1000V DC) to stress insulation and measure leakage resistance in megohms, revealing degraded or damaged insulation.

  7. What does ADS-B (Automatic Dependent Surveillance-Broadcast) transmit to improve situational awareness?

    Answer: Aircraft GPS-derived position, altitude, velocity, and identification to all receivers

    ADS-B Out automatically broadcasts an aircraft's GPS position, pressure altitude, ground speed, and squawk code continuously without a secondary radar interrogation.