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B757 Review Questions

B757 Review Questions. Engines and APU. What conditions cause the engine to increase from minimum idle to approach idle and how long does approach idle maintained during the landing rollout?

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B757 Review Questions

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  1. B757 Review Questions

  2. Engines and APU • What conditions cause the engine to increase from minimum idle to approach idle and how long does approach idle maintained during the landing rollout? • When the engine anti-ice is activated, or the landing gear is down, or the flaps are set to 25 or 30 degrees. The engine remains in approach idle for 5 seconds after touchdown.

  3. Engines and APU • What is the effect of CLIMB 1 on the TMC? • When CLIMB 1 is selected, approximately 94% of the normal climb power is supplied by the engines.

  4. Engines and APU • TRUE / FALSE: Raising either thrust reverser handle shuts off the auto throttle system • True

  5. Engines and APU • What is the primary purpose of the EEC, and ELC system? • Over-boost protections, and Over-speed protection respectively.

  6. Engines and APU • Why do we start the left engine first? • So the PTU will not start

  7. Engines and APU • The thrust reverser status indicator is AMBER, what is the position of the associated reverser? • The reverser is unlocked or is in transit.

  8. Engines and APU • Engine start load shed ends when? • When engine N3 is above 50%

  9. Engines and APU • What is the primary thrust parameter for the B757? • EPR

  10. Engines and APU • What is the function of the thrust management computer? • Calculates a reference EPR based on existing pressure altitude and ambient temperature data from the air data computer for Takeoff.

  11. Engines and APU • What is the function of the TO/GA switch on the TMSP? • It is used to select takeoff thrust on the ground and go-around thrust in flight.

  12. Engines and APU • What engine indications are displayed on the EICAS secondary display? • N2, N3, fuel flow, oil pressure, oil temperature, oil quantity, and engine vibrations.

  13. Engines and APU • TRUE FALSE: Normal APU start consists of two flashes of RUN and one flash of a FAULT light • True

  14. Engines and APU • In flight with APU running you shut off the battery, does this cause the APU to shutdown? • No

  15. Engines and APU • What is indicated when the engine fuel valves and/or spar valves are illuminated? • The valves are not in agreement with the fuel control switch, or the respective fire switch.

  16. Engines and APU • What is the function of the engine start selector switched to GND? • Opens the start valve, arms the selected igniter.

  17. Engines and APU • When would you use RICH to start the engine? • Below EGT 0 degrees

  18. Engines and APU • How long is the start selector automatically held in GND? • Until 50% N3.

  19. Engines and APU • What is the function of the start selector in AUTO? • Closes start valve and terminates ignition. Selected igniters operate continuously with flaps extended and/or engine anti/ice ON.

  20. Engines and APU • What is the normal starter duty cycle? • Three cycles of up to 2 minutes continuous operation and run down to N3 0%, followed by 15 minutes of cooling.

  21. Engines and APU • What is the extended engine starter duty cycle? • Up to 4 minutes operation followed by a 15 minute cool down.

  22. Engines and APU • You are in severe turbulence, the start selector should be set to _____ • CONT

  23. Engines and APU • Do auto throttles respond to manually set EPR values? • No.

  24. Engines and APU • When would you expect the engines to be in low idle? • When in ground operation, if flight with gear up, flaps less than 25 degrees, and engine anti ice off.

  25. Engines and APU • Where are the APU fire controls located outside the aircraft? • Nose Gear

  26. Engines and APU • Auto throttles are only powered by what bus? • Left AC

  27. Engines and APU • How many batteries are required to start the APU? • Two.

  28. Engines and APU • Under what condition is the APU time-delay feature bypassed during APU shutdown? • If the APU bleed has already been closed for 60 seconds.

  29. Engines and APU • What is the APU starter duty cycle? • Maximum three attempts within 60 minutes.

  30. Engines and APU • TRUE/FALSE: EEC and ELC operate with all electrical failure • TRUE

  31. Engines and APU • Will you get EPR indications on STANDBY electrical power? • No.

  32. Engines and APU • What is the function of the APU battery? • Electrical power for starter, inlet door, and control circuitry

  33. Engines and APU • What is the function of the aircraft battery in relation to APU operation? • Provides electrical power for fire protection, fuel valve operation, DC fuel pump, and control circuitry backup.

  34. Engines and APU • What is the service ceiling of the APU operation • 42,000’

  35. Engines and APU • What is maximum altitude for APU electrical and pneumatic power? • 42,000’, and 17,000’ respectively

  36. Engines and APU • What would the illumination of the APU amber fault light indicate? • APU fuel valve is not in commanded position, or the APU has shut down due to a fire or fault.

  37. Engines and APU • What does the blinking RUN light indicate on APU startup • A self test of the control circuitry

  38. Engines and APU • What will cause the APU to automatically shut down on the ground? • Fire or Fault

  39. Engines and APU • What lights illuminated when the oil pressure is at or below minimums, i.e. the red line (18psi)? • ENG OIL PRESS

  40. Engines and APU • What does the D-TO above the EPR mean on the upper EICAS during takeoff • A de-rated takeoff using FLEX temperature is scheduled

  41. Engines and APU • The intermediate pressure compressor section and the intermediate pressure turbine on a common shaft on the rotor. • N2.

  42. Engines and APU • Climb two is normally used for what? • Noise abatement - reduced thrust

  43. Engines and APU • The only oil filter that has a bypass provision is the? • Scavenge

  44. Engines and APU • Except during takeoff or go around, if the normal operating range of engine parameters is exceeded the indicators change from ? • White to amber or red - as appropriate.

  45. Engines and APU • If the Secondary Engine display is not in view when the engine vibrations exceeds_____ , the vibration monitors will automatically display • 2.5 units

  46. Engines and APU • TRUE/FALSE: The engines may be operated without the EEC? • True

  47. Engines and APU • During takeoff or go-around, N1, EGT, N2 and N3 remain white for _______after the amber band is reached and _______for single engine operation. • 5 minutes; 10 minutes

  48. Engines and APU • The engine is available for unrestricted use even though the oil temperature is _____in the band? • Amber

  49. Engines and APU • The engines are ______axial flow turbofans of high compression and bypass ratio and are rated at ________pounds of thrust • Three-rotor; 42,700

  50. Engines and APU • Is it normal for the APU FAULT to illuminate temporarily during APU start or shutdown? • Yes.

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