Airbus A350 - Pressurization - SmartCockpit - Airline training guides, Aviation, Operations, Safety

What is the meaning of this indication?

The cabin altitude is in manual mode. The cabin altitude is 4000 ft, approaching the target of 5000 ft.

The cabin altitude is in automatic mode. The target for cabin altitude is 5000 ft.

The cabin altitude is in manual mode. The cabin altitude is abnormal: the target is 4000 ft but the cabin altitude is 5000 ft.

The manual cabin altitude mode is ready to be activated. The cabin altitude is abnormal.

Correct! Wrong!

During takeoff, the Cabin Pressure Control System (CPCS) pressurizes the aircraft to provide a smooth variation of the cabin vertical speed at liftoff.

False.

True.

Correct! Wrong!

The pressurization system is in auto mode. If the LDG ELEVN (landing elevation) indicates 7000 ft, this means:

The pressurization system does not receive valid LDG ELEVN data from the FMS or the ISIS. It is associated with the CAB PRESS LDG ELEVN FAULT ECAM alert

The pressurization system does not receive valid LDG ELEVN data from the ISIS. It is associated with the CAB PRESS LDG ELEVN FAULT ECAM alert

The pressurization system does not receive valid LDG ELEVN data from the FMS. It is associated with the CAB PRESS LDG ELEVN FAULT ECAM alert

Correct! Wrong!

At touchdown, all outflow valves open, to remove the residual differential pressure. Residual differential pressure removal takes:

Less than 45 s.

Less than 30 s.

Less than 10 s.

Less than 90 s.

Correct! Wrong!

The cabin vertical speed is displayed, when the A/C is in flight. The cabin vertical speed arrow and digital indication pulse in green if:

The cabin vertical speed is more than +1 300 fpm or less than -1 600 fpm.

The cabin vertical speed is more than +1 500 fpm or less than -1 500 fpm.

The cabin vertical speed is more than +1 800 fpm or less than -1 800 fpm.

Correct! Wrong!

The aircraft is equipped with one negative relief valve, that operates mechanically with differential pressure. The negative relief valve prevents the negative differential pressure from going too high. The negative relief valve is installed on the right side of the forward part of the aircraft, above the flotation line. The negative relief valve mechanically-opens, in order to not exceed the maximum negative differential pressure, which is equal to:

1 PSI.

0.900 PSI.

0.725 PSI.

1.250 PSI.

Correct! Wrong!

Which statement is true?

In automatic mode (when the CABIN ALT MODE pb-sw and CABIN VS MODE pb-sw are set to AUTO), one Outflow valve Control Unit (OCU) automatically controls the cabin altitude target.

There are two Outflow valve Control Units (OCUs). OCU1 computes the cabin pressure targets and provides corresponding commands to OCU2. Both OCUs drive their corresponding outflow valve, more open or closed, in order to reach the demanded pressure target. If one OCU fails the other one takes over the control of the two outflow valves.

If the differential pressure exceeds the maximum limit of the electronic differential pressure protection, the master OCU is shut off and the remaining OCU takes over control to recover, and opens one outflow valve.

Correct! Wrong!

In automatic mode (when the CABIN ALT MODE pb-sw and CABIN VS MODE pb-sw are set to AUTO), one Outflow valve Control Unit (OCU) automatically controls the cabin altitude target, and the cabin vertical speed. If the differential pressure exceeds the maximum limit of the electronic differential pressure protection, the master OCU is shut off and the remaining OCU takes over control to recover, and opens the two outflow valves.

During climb, the cabin vertical speed is determined to reach the scheduled cabin altitude at the top of climb defined by the FMS cruise level. The cabin vertical speed is limited to ______.

+ 500 fpm.

+ 400 fpm.

+ 700 fpm.

+ 600 fpm.

Correct! Wrong!

The pressurization takeoff phase occurs, when:

All doors are closed and latched, the main landing gear is compressed and engines are at takeoff power.

All doors are closed, at least one landing gear is compressed and thrust levers are above idle.

All doors are closed, at least one landing gear is compressed and engines are at takeoff power.

Correct! Wrong!

The cabin vertical speed needle display ranges from:

- 2 500 fpm to + 2 500 fpm.

- 3 000 fpm to + 3 500 fpm.

- 3 500 fpm to + 3 000 fpm.

- 3 000 fpm to + 4 000 fpm.

Correct! Wrong!

When the CABIN ALT MODE pb-sw is set to MAN, the flight crew uses the selector to manually select the cabin altitude target. Selected cabin altitude target is displayed on the CAB PRESS SD page only.

True.

False.

Correct! Wrong!

When the Cabin altitude is manually controlled, the cabin altitude must be manually selected via the _____. The cabin altitude target remains at the current value until the flight crew manually selects a new cabin altitude target.

CABIN PRESS selector

CABIN ALTITUDE selector

CABIN ALT TRGT selector.

Correct! Wrong!

In order to automatically control the cabin pressure, each OCU (Outflow valve Control Unit) uses the FMS flight plan (including the landing elevation), together with current outside air pressure, and air conditioning system status (the landing elevation is necessary to be in automatic mode). The OCUs use an internal pressure sensor to determine the cabin differential pressure, and the cabin altitude. The cabin vertical speed is determined via a predetermined scale.

True

False

Correct! Wrong!

In automatic and manual mode the pressurization system prevents the positive and negative differential pressure from going too high. It also prevents the cabin altitude from going too high. The two outflow valves close when the cabin altitude exceeds _ in automatic mode and _ in manual mode.

14 000 ft and 16000 ft.

14 000 ft and 14 700 ft.

14 000 ft and 15 000 ft.

14 000 ft and 14 900 ft.

Correct! Wrong!

To regulate the cabin pressure the pressurization system has:

Two independent automatic controllers, one manual controller, two outflow valves.

Two identical and automatic controllers, two manual controllers, two outflow valves.

Two identical, independent and automatic controllers, one manual controller, two outflow valves.

Correct! Wrong!

In automatic mode (when the CABIN ALT MODE pb-sw and CABIN VS MODE pb-sw are set to AUTO), one Outflow valve Control Unit (OCU) automatically controls the cabin altitude target, and the cabin vertical speed. There are two OCUs. OCU1 computes the cabin pressure targets and provides corresponding commands to OCU2. Both OCUs drive their corresponding outflow valve, more open or closed, in order to reach the demanded pressure target. If one OCU fails the other one takes over the control of the two outflow valves.

False.

True.

Correct! Wrong!

The manual pressurization system operates independently of the automatic pressurization system. To obtain the desired cabin altitude and vertical speed, the manual pressurization system uses external pressure from:

The left static port.

The ISIS (as well as cabin pressure).

The ADIRS.

The all the static ports.

Correct! Wrong!

The cabin altitude needle and digital indication pulse in green (except for high altitude airport operations (Landing elevation is more than 8 000 ft), if the cabin altitude is above 8 300 ft, and below 9 550 ft. They stop pulsing, if the cabin altitude goes below 8 100 ft.

True.

False.

Correct! Wrong!

In MANUAL MODE, The cabin vertical speed target has priority over the cabin altitude target.

False.

True.

Correct! Wrong!

A gray arc from 0 fpm to 2 500 fpm appears when the cabin altitude and the cabin vertical speed are both manually controlled, when the cabin vertical speed target is more than the current cabin vertical speed. The gray arc indicates the flight crew the acceptable range to set the cabin vertical speed target. The cabin altitude target has priority over the cabin vertical speed target.

When the aircraft is above 25 000 ft, the cabin vertical speed is limited to . When the aircraft is below 25 000 ft, the cabin vertical speed is limited to .

- 250 fpm and - 300 fpm.

- 350 fpm and - 200 fpm.

- 300 fpm and - 250 fpm.

- 300 fpm and - 200 fpm.

Correct! Wrong!

______ all outflow valves open, to ensure there is no differential pressure between the air inside the aircraft and the external air.

Before takeoff.

When the aircraft lifts off.

When the aircraft moves under its own power.

When the aircraft is electrically energized.

Correct! Wrong!

There are two outflow valves:

One is in the forward part of the aircraft and the other one is in the aft part of the aircraft.

Both are located in the aft Left part of the aircraft.

Both are located in the aft Right part of the aircraft.

Correct! Wrong!

When the RAM AIR pb is set to ON, both packs are off, and the differential pressure is less than _____, the system automatically opens the outflow valves to approximately 50 %, to ensure the ventilation of the cockpit and cabin.

3.5 PSI.

1.5 PSI.

2.0 PSI.

1 PSI.

Correct! Wrong!

In the event the pressurization system fails, one independent overpressure relief valve automatically prevents positive and negative cabin pressure from going too high. This valve is located:

In the rear pressure bulkhead.

Near the APU Gearbox.

On the Left side of the fuselage besides the rear outflow valve.

Correct! Wrong!

During automatic operation and before takeoff, all outflow valves close, to ensure there is no differential pressure between the air inside the aircraft and the external air.

True.

False.

Correct! Wrong!

Before takeoff all outflow valve open.

What is the true statement?

The needle and digital indication pulse in amber when the landing gear is in the landing position, if the differential pressure is more than 1.5 PSI. They stop pulsing, if the differential pressure goes below 1 PSI.

The needle and digital indication pulse in green when the landing gear lever is selected to down, if the differential pressure is more than 1.5 PSI. They stop pulsing, if the differential pressure goes below 1 PSI.

The digital indication pulses in green during final approach, if the differential pressure is more than 1 PSI. They stop pulsing, if the differential pressure goes below 1 PSI.

The needle and digital indication pulse in green during final approach, if the differential pressure is more than 1.5 PSI. They stop pulsing, if the differential pressure goes below 1 PSI.

Correct! Wrong!

If the cabin altitude exceeds _____, the ECAM will trigger the red CAB PRESS EXCESS CAB ALT warning on the WD.

9 900 ft

9 550 ft.

9 700 ft

10 000 ft

Correct! Wrong!

The aircraft is pressurized at a rate of ______ : this ensures a differential pressure of 0.1 PSI at liftoff.

+ 200 fpm.

+ 100 fpm.

+ 350 fpm.

– 300 fpm.

Correct! Wrong!

The pressurization abort phase occurs, when:

The aircraft altitude is less than 5 000 ft above the aircraft altitude at takeoff.

The aircraft vertical speed is less than +250 ft/minfor 30 s.

All answers are correct.

The aircraft is at takeoff phase or climb phase.

Correct! Wrong!

The pressurization climb phase stars from the liftoff when:

The Air Data Computer senses a climb

The radio altimeter senses a climb.

The main landing gear is no longer compressed.

Correct! Wrong!

The pressurization descent phase occurs:

Less than 1 min before top of descent if AP and NAV mode are engaged or 1 000 ft below the cruise altitude if AP or NAV mode is not engaged.

Less than 5 min before top of descent if AP and NAV mode are engaged or 1 000 ft below the cruise altitude if AP or NAV mode is not engaged

Less than 3 min before top of descent if AP and NAV mode are engaged or 500 ft below the cruise altitude if AP or NAV mode is not engaged.

Correct! Wrong!

During cruise, the cabin altitude is regulated not to exceed:

6 000 ft.

5 800 ft.

6 500 ft

7 800 ft.

Correct! Wrong!

If the differential pressure exceeds the maximum limit of the electronic differential pressure protection, the master OCU (Outflow valve Control Unit) is shut off and the remaining OCU takes over control to recover, and opens the two outflow valves. This limit is equal to:

9.20 PSI

9.80 PSI

8.95 PSI.

9.65 PSI.

Correct! Wrong!

During descent, the cabin vertical speed is controlled, to ensure that the cabin altitude reaches ______ the landing elevation prior to landing.

An altitude slightly above.

An altitude slightly below.

A default value of 1 pct. above.

Correct! Wrong!

During cruise the cabin altitude is regulated to remain:

Below 6 000 ft.

Below 5 000 ft

Below 7500 ft

Above 4000 ft

Correct! Wrong!

Airbus A350 - Pressurization

Airbus A350 – Pressurization

What is the meaning of this indication?

During takeoff, the Cabin Pressure Control System (CPCS) pressurizes the aircraft to provide a smooth variation of the cabin vertical speed at liftoff.

The pressurization system is in auto mode. If the LDG ELEVN (landing elevation) indicates 7000 ft, this means:

At touchdown, all outflow valves open, to remove the residual differential pressure. Residual differential pressure removal takes:

The cabin vertical speed is displayed, when the A/C is in flight. The cabin vertical speed arrow and digital indication pulse in green if:

Which statement is true?

During climb, the cabin vertical speed is determined to reach the scheduled cabin altitude at the top of climb defined by the FMS cruise level. The cabin vertical speed is limited to ______.

The pressurization takeoff phase occurs, when:

The cabin vertical speed needle display ranges from:

When the CABIN ALT MODE pb-sw is set to MAN, the flight crew uses the selector to manually select the cabin altitude target. Selected cabin altitude target is displayed on the CAB PRESS SD page only.

When the Cabin altitude is manually controlled, the cabin altitude must be manually selected via the _____. The cabin altitude target remains at the current value until the flight crew manually selects a new cabin altitude target.

To regulate the cabin pressure the pressurization system has:

The manual pressurization system operates independently of the automatic pressurization system. To obtain the desired cabin altitude and vertical speed, the manual pressurization system uses external pressure from:

The cabin altitude needle and digital indication pulse in green (except for high altitude airport operations (Landing elevation is more than 8 000 ft), if the cabin altitude is above 8 300 ft, and below 9 550 ft. They stop pulsing, if the cabin altitude goes below 8 100 ft.

In MANUAL MODE, The cabin vertical speed target has priority over the cabin altitude target.

When the aircraft is above 25 000 ft, the cabin vertical speed is limited to ______. When the aircraft is below 25 000 ft, the cabin vertical speed is limited to ______ .

______ all outflow valves open, to ensure there is no differential pressure between the air inside the aircraft and the external air.

There are two outflow valves:

When the RAM AIR pb is set to ON, both packs are off, and the differential pressure is less than _____, the system automatically opens the outflow valves to approximately 50 %, to ensure the ventilation of the cockpit and cabin.

In the event the pressurization system fails, one independent overpressure relief valve automatically prevents positive and negative cabin pressure from going too high. This valve is located:

During automatic operation and before takeoff, all outflow valves close, to ensure there is no differential pressure between the air inside the aircraft and the external air.

What is the true statement?

If the cabin altitude exceeds _____, the ECAM will trigger the red CAB PRESS EXCESS CAB ALT warning on the WD.

The aircraft is pressurized at a rate of ______ : this ensures a differential pressure of 0.1 PSI at liftoff.

The pressurization abort phase occurs, when:

The pressurization climb phase stars from the liftoff when:

The pressurization descent phase occurs:

During cruise, the cabin altitude is regulated not to exceed:

If the differential pressure exceeds the maximum limit of the electronic differential pressure protection, the master OCU (Outflow valve Control Unit) is shut off and the remaining OCU takes over control to recover, and opens the two outflow valves. This limit is equal to:

During descent, the cabin vertical speed is controlled, to ensure that the cabin altitude reaches ______ the landing elevation prior to landing.

During cruise the cabin altitude is regulated to remain:

When the aircraft is above 25 000 ft, the cabin vertical speed is limited to . When the aircraft is below 25 000 ft, the cabin vertical speed is limited to .