FAA题库之Powerplant
FAA题库之Powerplant压缩包包括：
Auxiliary Power Units.doc
Engine Cooling Systems.doc
Engine Electrical Systems.doc
Engine Exhaust and Reverser Systems.doc
Engine Fire Protection Systems.doc
Engine Fuel Systems.doc
Engine Inspection.doc
Engine Instrument Systems.doc
Fuel Metering Systems.doc
Ignition and Starting Systems.doc
Induction and Engine Airflow Systems.doc
Lubrication Systems.doc
Propellers.doc
Reciprocating Engines 文档.doc
Turbine Engines.doc
001. The function of an APU air inlet plenum is to
stabilizes the pressure of the air before it enters the compressor
The APU air inlet plenum is a compartment, or chamber, into which the air flows before it enters the APU compressor. The plenum stabilizes the air pressure.
002. Fuel is normally supplied to an APU from
the airplane's main fuel supply
The fuel used by an APU is normally taken from the airplane's main fuel supply.
003. Usually, most of the load placed on an APU occurs when
the bleed air valve is opened
The majority of the load on an APU is the pneumatic load, and opening the bleed air valve places this load on the APU.
004. Generally, when maximum APU shaft output power is being used in
conjunction with pneumatic power
Pneumatic loading will be automatically modulated to maintain a safe EGT
APUs can normally supply all of the required electrical and pneumatic power. When the maximum shaft output power is being used, the pneumatic load is modulated, or varied, to keep the EGT within the safe range.
005. When in operation, the speed of an APU
Remains at or near rated speed regardless of the load condition
The fuel control system used on an APU automatically controls the fuel for starting and then brings the engine up smoothly to its rated RPM. It automatically maintains this RPM as the air or electrical load conditions change.
006. Frequently, an aircraft's auxiliary power unit (APU) generator
is identical to the engine-driven generators
The power produced by an APU must be the same as that produced by the engine-driven generators, and APU generators are often identical to those driven by the engines.
007. When necessary, APU engine cooling before shutdown may be accomplished by
Closing the bleed air valve
The APU control contains a time delay that closes the bleed air valve to remove the largest part of the APU load and allows the APU to cool down before it is shut down.
008. On APU's equipped with a free turbine and load compressor, the primary
function of the load compressor is to
Provide bleed air for aircraft pneumatic systems
APUs that have a free turbine and load compressor are actually turboshaft engines in which a free turbine drives a compressor that is totally independent of the APU gas-generator compressor. The bleed air from the load compressor supplies pneumatic power for starting the main engines and other airplane functions.
009. Fuel scheduling during APU start and under varying pneumatic bleed and
electrical loads is maintained
automatically by the APU fuel control system
The fuel control system used on an APU automatically controls the fuel for starting and then brings the engine up smoothly to its rated RPM. It automatically maintains this RPM as the air or electrical load conditions change.
010. An APU is usually rotated during start by
An electric starter
The small gas turbine engine that provides electrical power and compressed air is started by a DC electric starter. 这个是个好东西，既可以学习专业英语，又可以当作资料来复习，没事多背背还能练练口语什么的~~~多谢楼主分享了 这个是口试还是笔试啊 不是笔试题 楼主好人 手臂天气 非常好的资料，好像有个APP软件？ 这题目不是FAA执照笔试题库，请大家注意了！！！！！！！！
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