Type training · Boeing 757 B1.1 · ATA 73–80

Boeing 757 B1.1: RB211-535E4 Air, Fuel, Starting and Reverser (ATA 73–80)Type training questions & answers

Compressor bleed and surge control, fuel control and the EEC, ignition, starting and the thrust reverser.

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Sample RB211-535E4 Air, Fuel, Starting and Reverser questions with answers

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

  1. 1.How many compressor bleed valves control engine airflow?

    • A.Four: two IP, two HP
    • B.Six: three IP6, one HP2, two HP3
    • C.Eight: four IP and four HP stages
    Show answer and explanation

    Correct answer: B. Six: three IP6, one HP2, two HP3

    They dump compressor air into the fan stream to prevent surge at low power and during transients.

  2. 2.What parameter does the BVCU use to schedule the bleed valves?

    • A.N2 over the square root of T2
    • B.EPR and total air temperature
    • C.N3 and the fuel flow rate
    Show answer and explanation

    Correct answer: A. N2 over the square root of T2

    This corrected speed is proportional to compressor mass flow. Thrust lever rate and an altitude switch modify the schedule.

  3. 3.Above what altitude does the BVCU use a different bleed schedule?

    • A.18,000 ft
    • B.10,000 ft
    • C.25,000 ft
    Show answer and explanation

    Correct answer: A. 18,000 ft

    Surge margin is lower at altitude, so some valves close later.

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Part of the Boeing 757 B1.1 type course

One chapter of the Boeing 757 B1.1 type course question bank, for the 757-200 with Rolls-Royce RB211-535E4 engines, 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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