Pressurization

Question 1

Which of the following DOES NOT provide input to the pressurization controllers?

Thrust Levers
LGCIUs
FADECs
ADIRUs

Answer 1

FADECs

Question 2

The input provided by the Flight Management and Guidance Computers (FMGCs) enable the pressurization controllers to?

• Know your current rate of climb.
• Know when you are on the ground.
• Know when you are commencing takeoff.
• Know the planned cruise altitude and plan the cabin climb profile
  accordingly.

Answer 2

Know the planned cruise altitude and plan the cabin climb profile accordingly.

Question 3

The following areas are not pressurized:

• Radome and landing gear bays.
• Cargo compartment.
• Radome, landing gear bays, air conditioning compartment and tail.
• Air conditioning compartment and tail.

Answer 3

Radome, landing gear bays, air conditioning compartment and tail.

Question 4

The pressurization controllers use the elevation of your destination airport to plan the descent profile. In normal operations, this information is provided:

• By the FMS database once you begin the descent.
• By the FMS database once you enter the destination airport into the
  MCDU.
• Only after the aircraft rate of descent is greater that 200 ft/min for 30
  seconds.
• From the elevation selected using the LDG ELEV selector on the
  overhead CABIN PRESS panel.

Answer 4

By the FMS database once you enter the destination airport into the MCDU.

Question 5

The two pneumatic pressurization safety valves:

• Open automatically when it becomes necessary to relieve excess
  positive
  or negative cabin pressure differentials.
• Open automatically when it becomes necessary to relieve excess
  positive
  cabin pressure differentials only.
• Open automatically when it becomes necessary to relieve excess
  negative cabin pressure differentials only.
• Are opened by using the DITCHING pb.

Answer 5

Open automatically when it becomes necessary to relieve excess positive OR negative cabin pressure differentials.

Question 6

After landing, the active and standby pressurization controllers:

• Automatic transfer occurs after 70 seconds.
• Swap roles when TOGA is selected.
• Continue to operate on the selected system.
• Revert to manual mode.

Answer 6

Automatic transfer occurs after 70 seconds.

Question 7

With the pressurization in manual mode, the outflow valve is now controlled by:

• The thrust levers.
• The MAN V/S control switch.
• The PACK pb.
• The LDG ELEV AUTO Dial.

Answer 7

The MAN V/S control switch.

Question 8

With MODE SEL in MAN, moving the MAN V/S:

• UP opens the outflow valve and DN closes it.
• UP changes controllers and DN restores the previous controller.
• UP raises the landing field elevation.
• UP closes the outflow valve and DN opens it.

Answer 8

UP opens the outflow valve and DN closes it.

Question 9

The ditching pushbutton is used to:

• Close the outflow and safety valves.
• Close all fuselage openings below the floatation line.
• Close the outflow valve, vent valves.
• Close the outflow flow valve.

Answer 9

Close all fuselage openings below the floatation line.

Question 10

On landing, cabin altitude will be:

• Field density altitude.
• Field pressure altitude.
• Slightly lower than field pressure altitude.
• Slightly above field pressure altitude.

Answer 10

Slightly lower than field pressure altitude.

Question 11

In Ground Mode, the outflow valve will:

• Gradually open during landing rollout.
• Remain partially open until both engines are shut down.
• Fully open when the first engine is shut down.
• Fully open after both engines are shut down.

Answer 11

Gradually open during landing rollout.

Question 12

Pressurization Abort Mode:

• Is activated in the event of an ATC reroute.
• Opens the outflow valve if the aircraft aborts takeoff roll.
• Is activated in the event of an aborted landing.
• Is activated if aircraft must return to the departure airport after takeoff.

Answer 12

Is activated if aircraft must return to the departure airport after takeoff.

Question 13

Which control would you use to manually switch from the automatic pressurization control to manual control?

• Mode SEL to MAN.
• MAN VS CTL - UP or DN.
• Move LDG ELEV out of the AUTO Position.
  -Press LDG ELEV to release.

Answer 13

Mode SEL push button to MAN.

Question 14

With the pressurization in manual mode, the outflow valve is now controlled by:

• The MAN V/S control switch.
• The LDG ELEV AUTO Dial.
• The thrust levers.
• The PACK pb.

Answer 14

The MAN V/S control switch

Question 15

According to this CAB PRESS page:

• The MAN V/S control switch.
• The LDG ELEV AUTO Dial.
• The thrust levers.
• The PACK pb.

Answer 15

Controller #1 is active and controller #2 is in standby.

Question 16

How many feet per minute is the cabin currently climbing?

Answer 16

250

Question 17

The cabin pressurization controllers receive information from the FMGCs for landing elevation. By reviewing the Cabin Pressurization page, you can verify this by:

• No amber in LDG ELEV
• CAB ALT 650 FT
• CAB PRESS is white
• LDG ELEV AUTO 650 FT

Answer 17

LDG ELEV AUTO 650 FT

Question 18

According to this CAB PRESS page:

• Cabin pressure differential (delta p) is 7.2, the cabin vertical
  speed is 1000, and the current cabin altitude is 5200.
• Cabin pressure differential (delta p) is 5.6, the cabin vertical
  speed is -500, and the current cabin altitude is 2500.
• Cabin pressure differential (delta p) is 4.5, the cabin vertical
  speed is 250, and the current cabin altitude is 2700.
• Cabin pressure differential (delta p) is 6.1, the cabin vertical speed is 0,
  and the current cabin altitude is 3750.

Answer 18

Cabin pressure differential (delta p) is 4.5, the cabin vertical speed is 250, and the current cabin altitude is 2700.

Question 19

According to this CRUISE page:

• Cabin pressure differential (delta p) is 7.4, the cabin vertical speed is 0,
  and the current cabin altitude is 5650.
• Cabin pressure differential (delta p) is 4.6, the cabin vertical speed
  is -650, and the current cabin altitude is 3850.
• Cabin pressure differential (delta p) is 6.0, the cabin vertical speed is
  500, and the current cabin altitude is 4000.
• Cabin pressure differential (delta p) is 2.3, the cabin vertical speed is
  850, and the current cabin altitude is 1000.

Answer 19

Cabin pressure differential (delta p) is 7.4, the cabin vertical speed is 0, and the current cabin altitude is 5650.

Question 20

On this CRUISE page, why is the cabin vertical speed indicator in an analog format?

• The MODE SEL pb has been selected to MAN, and the
  pressurization system is being operated in the manual mode.
• Cabin vertical speed has exceeded preset limits.
• Cabin vertical speed is under automatic control.
• It always looks like this.

Answer 20

The MODE SEL pb has been selected to MAN, and the pressurization system is being operated in the manual mode.

Question 21

True or False: If both controllers fail, operation is automatically transferred to manual control.

Answer 21

False

Question 22

How can you manually set the field elevation?

• Pulling LDG ELEV selector out and dialing it against outer scale.
• Through the FMCG.
• Using manual pressurization mode.
• Only through IRU-1.

Answer 22

Pulling LDG ELEV selector out and dialing it against outer scale.

Question 23

The ditching pushbutton is used to:

• Close the outflow flow valve.
• Close the outflow and safety valves.
• Close the outflow valve, vent valves.
• Close all fuselage openings below the floatation line.

Answer 23

Close all fuselage openings below the floatation line.

Question 24

In Ground Mode, the outflow valve will:

• Remain partially open until both engines are shut down.
• Gradually open during landing rollout.
• Fully open when the first engine is shut down.
• Fully open after both engines are shut down.

Answer 24

Gradually open during landing rollout.

Question 25

Pressurization Abort Mode: - Is activated in the event of an aborted landing. - Is activated in the event of an ATC reroute. - Opens the outflow valve if the aircraft aborts takeoff roll. - Is activated if aircraft must return to the departure airport after takeoff.

Answer 25

Is activated if aircraft must return to the departure airport after takeoff.