Pressurization Flashcards
Learn Pressurization SYS on the XLS
Cabin pressure is normally maintained by
A. Controlling the amount of air entering the cabin
B. Controlling the amount of air escaping the cabin
C. Modulating the temperature of the cabin temperature controller
D. Manipulating the throttles
B
The normal outflow valve control modes are? A. Ground taxi mode B. Take off mode C. Flight descent and landing mode D. All the above
D.
As both throttles are advanced above 85% N2 on the ground the outflow valve slowly closes driving the cabin pressure down below field altitude this is the A. Flight mode B. Ground mode C. take off mode D. none of the above
C
What opens the 2 outflow valves to climb the cabin
A. Selecting auto with the pressurization system select switch uses the digital cabin pressure controller to meter a ejector vacuums to the climb solenoid of the primary valve
B. The emer dump switch sends DC power to the climb solenoid and the cabin raises to 14500’ feet cabin altitude limit valve
C. Placing the pressure system select switch to manual and using the manual toggle(cherry picker) to manually meter ambient low pressure air to both outflow valves
D. All the above
D
What closes the 2 outflow valves to drive the cabin
A. Selecting auto with the press system select switch uses the digital cabin pressure controller to meter 6.0 PSI service air pressure or cabin air pressure to the dive silonoid
B. Placing the press system select switch to the manual position and using the cherry picker to manually meter cabin pressurized air to the secondary valve only
C. Both A and B
D. None of the above
A
If control vacuum becomes excessive in flight cabin altitude
A. Explosively decompresses to cruise altitude
B. Will remain at present altitude
C. Rises to the maximum altitude limit valve setting of 14500 feet and cabin pressure enters the outflow valve reducing a vacuum effect and cabin stop climbing at approximately 14500 feet
D. Decreases to a value as determined by the Max differential pressure relief valve setting
C
The source of bleed air for cabin pressurization when the emer press light is illuminated in flight is
A. Vapor cycle air
B. the left engine
C. either or both engines
D. Ram air flow
B
The digital pressurization controller modes are
A. Isobaric mode
B. auto mode
C. manual mode
D a and B above
D
If the number one MADC fails in flight
A. The controller Amber light illuminates and switches to FL isoberic mode
B. It remains in the CA auto mode
C. Only manual control remains
D. It automatically switches to the EXER mode
A
During preflight the controller is normally set to
A. Destination field elevation
B. cruise plus 1000’ in the FL mode
C. field pressure altitude plus 500’
D. 300’ to 500’ fpm on the cabin rate of crime control
A
If the normal DC power is lost to the controller while pressurized the cabin altitude is
A. Uncontrollable
B. controlled by the EMER DUMP toggle lever
C. controlled by shutting off the bleed air
D controlled by the manual toggle lever (cherry picker)
D
Which statement is correct concerning the cabin altitude differential gauge
A. The cabin gauge measures inside air pressure
B this gauge requires DC power for operation
C. this is a manual reading type gauge and only senses differential pressure
D. requires data from the pressurization controller
C
