Pressurization Flashcards
Normally, air is discharged overboard to maintain cabin pressure through the ____.
outflow valve
At a normal pressure differential, the cabin can maintain _____ ft. altitude with an aircraft altitude of 41,000 ft.
8,000ft.
The Auto Pressurization System consists of ____ identical controllers with ____ controller(s) alternately sequenced as (the) primary operational unit(s) for each new flight.
2/1
For the pressurization auto controller to function properly, ____ is required to be preset.
landing altitude and cruise altitude
To switch the pressurization to the auto alternate controller, you ____.
must select ALTN on the Cabin Pressurization Panel
The AUTO FAIL light will illuminate automatically due to ____.
loss of DC power
When the pressurization AUTO FAIL light illuminates and the ALTN light does not, which statement is true?
Both channels have failed
The OFF SCHEDULE DESCENT light illuminates. This is caused by the ____.
pilot starting a descent prior to reaching selected cruise altitude
If an OFF SCHEDULE DESCENT light comes on, the pressurization system will ____.
pressurize the cabin back to the takeoff airport altitude
The pressurization outflow VALVE position indicator operates in ____ mode(s).
AUTO, ALTN and MANUAL modes
When operating cabin pressure in MANUAL, the third DC motor operates ____.
slower
The safety pressure relief valves open to keep differential pressure from exceeding ____ psi.
9.1
The automatic cabin pressure control system descent mode is activated when ____. Select the most correct answer.
the aircraft descends 0.25 psi below the selected value in the Flight Altitude (FLT ALT) Indicator.
If the external atmospheric pressure exceeds the internal cabin pressure, the ____ will open.
negative pressure relief valve
When operating on standby electrical power (battery only), the ____ cabin pressure controller is available.
manual
