Airbus A320 - Pneumatic System

If APU Bleed is ON and the crossbleed valve is shut, the Engine bleed valve 2 remains open.

False.

True.

Correct! Wrong!

The crossbleed valve has three electric motors: one for the automatic mode, one for the manual mode and one for the degraded mode.

True.

False.

Correct! Wrong!

The crossbleed valve has two electric motors: one for the automatic mode and one for the manual mode.

In flight if the air pressure is insufficient even with the HP valve open:

The engine spools up automatically.

Push the High Pressure pb on the overhead panel.

Engine power has to be increased by the pilot.

Correct! Wrong!

If bleed air is being supplied by the APU or if one pack fails, pack flow will go to _____ rate.

Medium.

High.

Low.

Correct! Wrong!

Air bleed from the engines is:

Only cooled in air conditioning part.

Not cooled prior to being used by the systems.

Cooled in a heat exchanger by cooling air bleed from the Fan section.

Correct! Wrong!

Each bleed valve is electrically operated and controlled by its associated BMC (Bleed Monitoring Computer).

False.

True.

Correct! Wrong!

Each bleed valve is pneumatically operated and controlled electrically by its associated BMC.

With the loss of pneumatic system pressure, the engine bleed valve will:

Assume the closed position.

Remain in its current position.

Assume the open position.

Correct! Wrong!

During Normal operation, when would the HP valve open?

At low thrust settings.

With pilot intervention on the overhead panel.

At TOGA power.

When IP pressure is insufficient for the demand.

Correct! Wrong!

Temperature regulation is controlled by:

One zone controller and two pack controllers.

The two BMCs.

Two pack controllers and the BMCs (Bleed Monitoring Computers)

Correct! Wrong!

The AUTO position of the X BLEED selector opens the crossbleed if:

An engine bleed valve is open.

When engine start is selected.

The APU bleed valve is open.

Correct! Wrong!

Recirculation fans in the air conditioning system direct filtered cabin air to which area?

The Mixing unit.

The pneumatic duct that is upstream of the packs.

The avionics compartment.

Correct! Wrong!

When selected ON, the APU bleed air will:

Supply bleed air only if the X BLEED selector is selected OPEN.

Supply bleed air if the ENG BLEED pbs are selected OFF.

Have priority over engine bleed air.

Correct! Wrong!

The pneumatic system supplies high-pressure air for air conditioning, engine starting, wing anti-icing, water pressurization and hydraulic reservoir pressurization.

True.

False.

Correct! Wrong!

Should both channels fail in a zone controller:

Temperature optimization is still available for that zone from another controller.

The pack is not affected.

Temperature optimization and the backup mode are lost.

Correct! Wrong!

When engine and wing anti-ice are in use, and a BMC detects a bleed leak:

The wing and engine anti-ice on the associated side will be lost.

The wing anti-ice on the associated side will be lost, and the engine anti-ice on the associated side will continue to function.

Only the engine anti-ice on the associated side will be lost.

Correct! Wrong!

A check valve near the crossbleed duct protects the APU, when bleed air comes from another source.

True.

False.

Correct! Wrong!

The overheat detection system uses a single loop for:

The pylons and APU.

The wings and pylons.

The wings and fuselage.

Correct! Wrong!

Engine bleed air temperature is controlled by:

A pre-cooler that uses fan air.

Conditioned air from the mixing unit.

Conditioned air from the Bleed Monitoring Computers (BMC1 and BMC2).

Correct! Wrong!

The APU BLEED pb-sw controls the APU bleed valve. When the flight crew selects ON with the pushbutton, APU bleed air supplies the pneumatic system, if the APU speed is _____. This opens the crossbleed valve and closes the engine bleed automatically.

Above 98% but less than 100%.

Normal (above 90% RPM).

Above 95 %.

Correct! Wrong!

The lavatory/galley extract fan operates:

Continuously when electrical power is available.

Only on the ground.

Only in flight.

Correct! Wrong!

Bleed air normally comes from the _____ of the engine.

Low pressure stage.

High pressure stage.

Intermediate stage.

Correct! Wrong!

A leak detection system detects any overheating in the vicinity of hot air ducts.

True.

False.

Correct! Wrong!

Temperature regulation is achieved by the precooler which regulates and limits the temperature at:

200 deg.C.

150 deg.C.

175 deg.C.

90 deg.C.

Correct! Wrong!

If a Bleed Monitoring Computer (BMC) fails:

The remaining BMC will automatically assume most of the failed BMC’s functions.

All systems associated with the failed BMC also fail.

The associated bleed valves close.

Correct! Wrong!

In normal operation which bleed air source has priority?

Engine Bleed.

RAM Air.

Ground Air.

APU.

Correct! Wrong!

In automatic mode, the crossbleed valve opens when the system is using APU bleed air.

It closes automatically if the system detects an air leak.

It closes if the system detects an air leak (except in flight).

It closes if the system detects an air leak (except during engine start).

Correct! Wrong!

If BMC1 (Bleed Monitoring Computer) fails BMC2 takes over all monitoring functions except:

Engine 1 and APU leak detection.

Overheat detection.

Automatic cross-bleed valve control.

Correct! Wrong!

For what condition will the APU BLEED FAULT light illuminate amber?

APU bleed leak.

APU overheat or bleed leak.

APU overheat.

Correct! Wrong!

An ECAM caution will also appear.

What happens when pressure and temperature are not sufficient to supply the corresponding engine bleed valve?

HP valve opens, IP stage remains in the same configuration.

HP valve closes, IP stage remains in the same configuration.

HP valve closes.

Correct! Wrong!

Air is normally bled from the intermediate pressure stage (IP) of engine’s high-pressure (HP) compressor to minimize fuel penalty.

False.

True.

Correct! Wrong!

Engine Bleed Indications – The Precooler outlet temperature is normally in green. It becomes amber, if:

The BMC detects an overheat or low temperature.

The BMC detects an overheat.

The BMC detects an overheat or low pressure.

Correct! Wrong!

The pressure regulating and shutoff valve will close if ___ pressure is _ or ___ airflow occurs.

Downstream / low / reverse.

Upstream / low / reverse.

Downstream / High / reverse.

Correct! Wrong!

BMC2 takes over all monitoring functions if BMC1 fails except for:

Overpressure detection.

Overheat detection.

APU and Engine 1 leak detection.

Correct! Wrong!

Airbus A320 – Pneumatic

Quiz

Airbus A320 - Pneumatic System

If APU Bleed is ON and the crossbleed valve is shut, the Engine bleed valve 2 remains open.

The crossbleed valve has three electric motors: one for the automatic mode, one for the manual mode and one for the degraded mode.

In flight if the air pressure is insufficient even with the HP valve open:

If bleed air is being supplied by the APU or if one pack fails, pack flow will go to _____ rate.

Air bleed from the engines is:

Each bleed valve is electrically operated and controlled by its associated BMC (Bleed Monitoring Computer).

With the loss of pneumatic system pressure, the engine bleed valve will:

During Normal operation, when would the HP valve open?

Temperature regulation is controlled by:

The AUTO position of the X BLEED selector opens the crossbleed if:

Recirculation fans in the air conditioning system direct filtered cabin air to which area?

When selected ON, the APU bleed air will:

The pneumatic system supplies high-pressure air for air conditioning, engine starting, wing anti-icing, water pressurization and hydraulic reservoir pressurization.

Should both channels fail in a zone controller:

When engine and wing anti-ice are in use, and a BMC detects a bleed leak:

A check valve near the crossbleed duct protects the APU, when bleed air comes from another source.

The overheat detection system uses a single loop for:

Engine bleed air temperature is controlled by:

The APU BLEED pb-sw controls the APU bleed valve. When the flight crew selects ON with the pushbutton, APU bleed air supplies the pneumatic system, if the APU speed is _____. This opens the crossbleed valve and closes the engine bleed automatically.

The lavatory/galley extract fan operates:

Bleed air normally comes from the _____ of the engine.

A leak detection system detects any overheating in the vicinity of hot air ducts.

Temperature regulation is achieved by the precooler which regulates and limits the temperature at:

If a Bleed Monitoring Computer (BMC) fails:

In normal operation which bleed air source has priority?

In automatic mode, the crossbleed valve opens when the system is using APU bleed air.

If BMC1 (Bleed Monitoring Computer) fails BMC2 takes over all monitoring functions except:

For what condition will the APU BLEED FAULT light illuminate amber?

What happens when pressure and temperature are not sufficient to supply the corresponding engine bleed valve?

Air is normally bled from the intermediate pressure stage (IP) of engine’s high-pressure (HP) compressor to minimize fuel penalty.

Engine Bleed Indications – The Precooler outlet temperature is normally in green. It becomes amber, if:

The pressure regulating and shutoff valve will close if _____ pressure is _____ or _____ airflow occurs.

BMC2 takes over all monitoring functions if BMC1 fails except for:

The pressure regulating and shutoff valve will close if ___ pressure is _ or ___ airflow occurs.