Pressurization Flashcards
T or F: the aircraft’s pressurization is provided by engine bleed air.
True.
Which valve is primarily manipulated to control the pressurization in the cabin of the aircraft?
Aft outflow valve.
How many safety valves are there in addition to the outflow valve?
Two.
How many different modes are there on the pressurization system?
Four: automatic, manual, emergency/smoke control, pressure dump.
Manual mode is used on the pressurization system for what reason?
If auto mode is inoperative.
Holding the spring-loaded toggle switch on the pressurization panel to the DECR side accomplishes what?
Opens the aft outflow valve to decrease cabin pressure by increasing cabin altitude.
Holding the spring-loaded toggle switch on the pressurization panel to the INCR side accomplishes what?
Closes the aft outflow valve to increase cabin pressure by decreasing cabin altitude.
If the aft outflow valve becomes inoperative, pressurization can be controlled by what?
The forward safety outflow valve.
Lifting the safety guard and rotating the forward safety outflow valve selector knob to the open position allows the ____ to be fully open during emergency operations.
Forward safety outflow valve.
When the pressurization system is in AUTO and the FWD outflow valve is rotated to the open position, it causes the AFT outflow valve to ____.
Close.
Which pressurization mode would be used to depressurize the aircraft most rapidly?
Dump.
T or F: when the pressurization system is set to DUMP, the aircraft can still be pressurized.
False.
If bleed air is unavailable in flight, the cabin and flight compartments can be ventilated with what?
Outside ram air.
The ram air vents used in flight when bleed air is not available are located on which part of the aircraft?
Dorsal fin.
What is the maximum pressure differential pressure permitted by the cabin pressure controller?
5.46 psi.
