Type training · Boeing 757 B2 · ATA 34

Boeing 757 B2: VOR, ILS, ADF, DME and GPS (ATA 34)Type training questions & answers

VOR and marker beacon receivers, ADF, ILS, GPS, DME and the RDMI.

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Sample VOR, ILS, ADF, DME and GPS questions with answers

Three questions from the free preview. Think of your answer first, then open the explanation.

  1. 1.What heading does the left RDMI compass card normally show?

    • A.From the off-side IRU
    • B.From the left (on-side) IRU
    • C.From the center IRU
    Show answer and explanation

    Correct answer: A. From the off-side IRU

    The left RDMI shows heading from the first officer's selected IRU. The single pointer shows left VOR or ADF, the double pointer right.

  2. 2.What is the ADF frequency range?

    • A.108–118 MHz
    • B.2–30 MHz HF
    • C.190–1,750 kHz
    Show answer and explanation

    Correct answer: C. 190–1,750 kHz

    Two receivers each have a combined loop and sense antenna on top of the fuselage. The receivers also pass AM broadcasts to the interphone.

  3. 3.What does the ADF sense antenna receive?

    • A.The magnetic field component
    • B.The electric field component
    • C.The station identifier only
    Show answer and explanation

    Correct answer: B. The electric field component

    The two loops (sine and cosine) receive the magnetic component. Sense removes the 180 degree ambiguity.

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Part of the Boeing 757 B2 type course

One chapter of the Boeing 757 B2 type course question bank, for the 757-200 avionics, written in our own words for revision. Your type course and the aircraft maintenance manual stay the authority: limits and procedures can differ between airframes and operators.

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