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单选题 APU is started up ( ) and shut down ( )
学科：默认课程
时间：2026-01-08 07:24:19
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题目1单选题
What recovery would be appropriate in the event of compressor stallA. Reduce throttle, reduce airspeed, and increase angle of attackB. Advance throttle, lower angle of attack, and reduce airspeedC. Reduce fuel flow, reduce angle of attack, and increase airspeed
题目2单选题
Which is not a purpose of cowlingA. Prevent engine from being damagedB. Adjust airflowC. Prevent airflow from entering engine
题目3单选题
High bypass ratio turbofan engine is suitable for ( ) large and medium-sized civil aircraft and transport aircraft as power deviceA. high subsonicB. transonicC. supersonic
题目4单选题
When a stall of compressor blades may occurA. When the compressor pressure is higher than combustor chamber pressureB. When the inlet velocity is low and RPM is highC. When the angle of incidence is low
题目5单选题
Which of the following measures can extend the service life of braking systemA. Taxi on a smooth taxiwayB. maintain constant speedC. Use reverse thrust as much as possible
题目6单选题
The reason of combustor shutting down can beA. excess air coefficient of gas mixture in combustion area is beyond stable combustion rangeB. engine lost of thrustC. accelerator manipulating failure
题目7单选题
Which of the following structural measures is not used to eliminate the compressor stallA. Bleed air from the compressorB. variable inlet guide vanes and two-spool rotator compressorC. engine anti-ice system
题目8单选题
Large jet airline supply fuel to engine through ( ) to enhance the efficiencyA. digital fuel regulatorB. simulate circuit fuel regulatorC. mechanical hydraulic fuel regulator
题目9单选题
What effect, if any, does high ambient temperature have upon the thrust output of a turbine engineA. Thrust will be higher because more heat energy is extracted from the hotter airB. Thrust will remain the same, but turbine temperature will be higherC. Thrust will be reduced due to the decrease in air density
题目10单选题
APU is started up ( ) and shut down ( )A. in the cockpit; outside the aircraftB. in the cockpit; in the cockpit and outside the aircraftC. in the cockpit; in the cockpit
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