题目内容

词汇与结构Recirculation fans ______the packs to maintain a constant ventilation rate through the cabin.

A. resist
B. assist
C. desist
D. subsist

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词汇与结构Hot trim air from the bleed air system is added to the pack conditioned air to _____the temperature in each zone.

A. increase
B. obtain
C. evaluate
D. control

词汇与结构The fans draw cabin air through____, then reintroduce the air into the conditioned air distribution system.

A. milers
B. meters
C. fillers
D. filters

词汇与结构The flight deck receives 100% fresh conditioned air from the left pack only, and is ______ at a slightly higher pressure than the passenger cabin to prevent smoke from entering the flight deck.

A. maintained
B. reduced
C. sustained
D. returned

词汇与结构When one or more RECIRCULATION FAN switches is OFF, the EICAS memo message RECIRC FANS OFF is ________.

A. displayed
B. sparked
C. proved
D. demonstrated