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Boeing 737 · Pneumatics 题库（22 题）

Boeing 737 机型「Pneumatics」相关知识共 22 道题。想练习或模拟考试，请到 题库 · 模拟考试。
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1.APU bleed air used to start NO.1 engine is

  1. Routed direct to the No.1 engine starter valve. ✓
  2. Routed via the No. 1 engine bleed air valve to the No.1 engine starter valve.
  3. Controlled by the modulating and shut-off valve.
正确答案：Routed direct to the No.1 engine starter valve.　·　737　·　来源 b737.org.uk

2.The amount of fan air that is ducted through the pre-cooler is controlled by the

  1. Ram air controller
  2. Thermostatic pre-cooler valve. ✓
  3. Modulating and shut-off valve.
正确答案：Thermostatic pre-cooler valve.　·　737　·　来源 b737.org.uk

3.With the Isolation Valve switch in AUTO, both engine bleed switches ON and both Air Conditioning Pack switches selected to AUTO or HIGH

  1. The isolation valve will be open.
  2. The isolation valve will be closed. ✓
  3. The isolation valve will be closed when the flaps are extended.
正确答案：The isolation valve will be closed.　·　737　·　来源 b737.org.uk

4.The DUAL BLEED light will be on

  1. With No. 2 engine bleed valve open, the isolation valve open and APU bleed valve open. ✓
  2. With the airconditioning panel set for a bleeds-off takeoff.
  3. With No. 1 and No. 2 bleed valves closed and APU bleed valve open.
正确答案：With No. 2 engine bleed valve open, the isolation valve open and APU bleed valve open.　·　737　·　来源 b737.org.uk

5.An engine BLEED TRIP OFF light will illuminate

  1. Only if engine bleed air pressure exceeds a predetermined limit.
  2. Only if engine bleed air temperature exceeds a predetermined limit.
  3. When engine bleed air temperature or pressure exceeds a predetermined limit. ✓
正确答案：When engine bleed air temperature or pressure exceeds a predetermined limit.　·　737　·　来源 b737.org.uk

6.The pneumatic duct pressure gauge

  1. Indicates pressure in left and right pneumatic ducts. ✓
  2. Indicates pressure available for engine anti-icing.
  3. Is DC powered.
正确答案：Indicates pressure in left and right pneumatic ducts.　·　737　·　来源 b737.org.uk

7.With a ground pneumatic source connected and the isolation valve switch selected to CLOSE

  1. The pneumatic pressure would be indicated by the left hand pointer on the pneumatic duct pressure indicator.
  2. The pneumatic pressure would be indicated by the right hand pointer on the pneumatic duct pressure indicator. ✓
  3. The pneumatic pressure would be indicated by both the left and right pointers on the pneumatic duct pressure indicator.
正确答案：The pneumatic pressure would be indicated by the right hand pointer on the pneumatic duct pressure indicator.　·　737　·　来源 b737.org.uk

8.The sources of engine bleed are

  1. 5th and 13th stages of the fan section.
  2. 5th and 9th stages of the turbine section.
  3. 5th and 9th stages of the compressor section. ✓
正确答案：5th and 9th stages of the compressor section.　·　737　·　来源 b737.org.uk

9.The 9th stage modulating and shut-off valve

  1. Will open if the APU is insufficient in maintaining proper pressure.
  2. Will open if the 5th stage air is insufficient in maintaining proper pressure. ✓
  3. Is open at all times irrespective of 5th stage air pressure output.
正确答案：Will open if the 5th stage air is insufficient in maintaining proper pressure.　·　737　·　来源 b737.org.uk

10.The engine bleed valves are

  1. AC activated and pneumatically operated.
  2. DC activated and pneumatically operated. ✓
  3. Pneumatically activated and operated.
正确答案：DC activated and pneumatically operated.　·　737　·　来源 b737.org.uk

11.Water tank pressurisation in flight is normally provided by

  1. 5th and 9th stage air from the No. 1 engine. ✓
  2. 5th and 9th stage air from the No. 2 engine.
  3. Bleed air from the APU.
正确答案：5th and 9th stage air from the No. 1 engine.　·　737　·　来源 b737.org.uk

12.Both hydraulic reservoirs are pressurised by

  1. 5th and 9th stage air from engine No. 2 only.
  2. Separate engine bleeds directly to the reservoirs.
  3. Air from the pneumatic manifold. ✓
正确答案：Air from the pneumatic manifold.　·　737　·　来源 b737.org.uk

13.The source air ducted through the pre-cooler is

  1. Fan air. ✓
  2. 5th stage bleed air.
  3. Pressure controlled ram air.
正确答案：Fan air.　·　737　·　来源 b737.org.uk

14.The A.P.U. bleed valve is

  1. Pneumatically controlled and operated.
  2. AC controlled and pneumatically operated.
  3. DC controlled and pneumatically operated. ✓
正确答案：DC controlled and pneumatically operated.　·　737　·　来源 b737.org.uk

15.The isolation valve is

  1. DC operated.
  2. AC controlled and pneumatically operated.
  3. AC operated. ✓
正确答案：AC operated.　·　737　·　来源 b737.org.uk

16.What initial action is required in the event of a WING BODY OVERHEAT light illuminating.

  1. Close the isolation valve and switch off the associated engine bleed. ✓
  2. Switch off the associated engine bleed.
  3. Close the isolation valve and switch off the associated air-conditioning pack.
正确答案：Close the isolation valve and switch off the associated engine bleed.　·　737　·　来源 b737.org.uk

17.The DUAL BLEED light is illuminated. Engine thrust

  1. Is unlimited. Dual bleed light is advisory only.
  2. Should be limited to idle. ✓
  3. Should be limited to 40% N1.
正确答案：Should be limited to idle.　·　737　·　来源 b737.org.uk

18.Which systems use engine bleed air during operation?

  1. Engine starting, air conditioning, cabin pressurisation, engine and wing anti-icing, hydraulic, water. ✓
  2. Engine and wing anti-icing, engine starting, cabin pressurisation, hydraulic reservoir pressurisation.
  3. Engine and wing anti-icing, air conditioning, cabin pressurisation, hydraulic reservoir pressurisation.
  4. Engine and wing anti-icing, engine starting, air conditioning, cabin pressurisation, hydraulic reservoir pressurisation.
正确答案：Engine starting, air conditioning, cabin pressurisation, engine and wing anti-icing, hydraulic, water.　·　NG　·　来源 Chair Flight B737 Question Bank

19.Bleed air is taken from stage 4 and stage 10 of the high pressure compressor.

  1. True
  2. False ✓
正确答案：False　·　NG　·　来源 Chair Flight B737 Question Bank

20.Bleed air is taken from stage 5 and stage 9 of the high pressure compressor.

  1. True
  2. False ✓
正确答案：False　·　NG　·　来源 Chair Flight B737 Question Bank

21.Bleed air is taken from stage 5 from the low pressure compressor and stage 9 of the high pressure compressor.

  1. True ✓
  2. False
正确答案：True　·　NG　·　来源 Chair Flight B737 Question Bank

22.What is the function of the dual Bleed Light?

  1. Illuminates to warn of possible backpressure whenever both engines are providing bleed air, and engines are at different thrust settings.
  2. Illuminates whenever both APU and engines is running to warn of risk of backpressure to APU.
  3. Illuminates when engine running and APU bleed air valve, engine bleed air valve, and isolation valve are in a position to permit possible backpressure of the APU. ✓
  4. Illuminates whenever pressure in APU rises above a pre-set value.
正确答案：Illuminates when engine running and APU bleed air valve, engine bleed air valve, and isolation valve are in a position to permit possible backpressure of the APU.　·　NG　·　来源 Chair Flight B737 Question Bank
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