Airbus A350 - Ventilation

Avionics ventilation - Each ventilation circuit has _______ . If the blowing fans cannot correctly cool the avionics bay, the backup valve of the affected circuit automatically opens. This enables air from the air conditioning system, to cool the avionics systems.

Two backup valves.

Three backup valves.

One backup valve.

Correct! Wrong!

The backup valve opens if the associated blowing fan fails / if the airflow in the ventilation circuit is not sufficient. For example: the associated filter is clogged.

A ventilation system cools the two pack bays, and is fully automatic. The pack bay areas are ventilated by external air. In flight, external air flows into each pack bay area, through an air inlet. Both air inlets are:

In the aft belly fairing.

Near the outflow valve.

In the forward belly fairing.

Correct! Wrong!

The batteries are ventilated during the flight by _______ that is extracted and discharged overboard via differential pressure.

Cargo air

Cabin air

Cargo and cabin air

Correct! Wrong!

The cockpit is automatically ventilated, with air from:

The flight deck recirculation fan

The Supplemental Cooling System (SCS)

The mixer unit.

Correct! Wrong!

If the electrical heater is at LOW power, it delivers:

50 pct of the HIGH power value.

75 pct of the HIGH power value.

25 pct of the HIGH power value.

Correct! Wrong!

The bulk cargo compartment is _______ ventilated.

Manually or automatically.

Manually.

Automatically.

Correct! Wrong!

There are two blowing fans, that blow recirculated air from the cabin in the various cockpit panels and electronic equipment. Each avionics ventilation circuit has one blowing fan. For both avionics ventilation circuits, the air is first filtered, before it enters the blowing fan.

Both blowing fans automatically operate when at least one engine is running.

Both blowing fans automatically operate when the two engines are running.

Both blowing fans automatically operate when the aircraft is powered by electricity.

Correct! Wrong!

The forward and aft cargo compartments are automatically ventilated, with air from the air-conditioning system. Air flows into the cargo compartments, via:

Two cargo inlet isolation valves for each cargo compartment (forward and aft).

The Cargo air distribution valves

One inlet ventilation valve for each cargo compartment

Correct! Wrong!

The avionics ventilation system cools the electrical and electronic equipment in the avionics bay and in the cockpit panels.

False.

True.

Correct! Wrong!

Pack bay ventilation - The pack bay areas are ventilated by external air.

On ground, two blowing fans ventilate both pack bay areas. These blowing fans are pneumatically-operated.

The two statements are correct.

In flight, external air flows into each pack bay area, through an air inlet. Both air inlets are in the forward belly fairing.

Correct! Wrong!

Each flight crew can manually adjust the airflow which goes around the onside rudder pedals. The airflow is adjusted with the FOOT VENT selector on the onside CAPT(FO) INDIVIDUAL VENT panel but the temperature of this airflow cannot be increased.

True.

False.

Correct! Wrong!

If necessary, the flight crew can manually force the cockpit ventilation.

False.

True.

Correct! Wrong!

In flight, when the AVNCS EXTRACT pb-sw on the VENT panel is set to OVRD: the overboard valve partially opens, and air is extracted and discharged through the overboard valve and inboard valve. The inboard valve remains closed only if the extract fans are running.

True.

False.

Correct! Wrong!

The inboard valve remains OPEN only if the extract fans are running!

The batteries are ventilated on ground by cabin air that is extracted and discharged overboard via differential pressure.

False.

True.

Correct! Wrong!

The batteries are ventilated during flight

Each avionics ventilation circuit has one backup valve. If the blowing fans cannot correctly cool the avionics bay, the backup valve of the affected circuit automatically opens. This enables air from the air conditioning system, to cool the avionics systems.

True.

False.

Correct! Wrong!

In some cabin areas (e.g. lavatories, galleys) to avoid bad smells, air is extracted and then directly discharged:

Overboard.

In the APU bay area.

In the cargo area.

Correct! Wrong!

On ground, two blowing fans ventilate both pack bay areas. Bleed air, from any available bleed supply, flows through two supply valves and drives both fans. The ASCU controls the blowing fans that are:

Electrically-operated.

Hydraulically-operated.

Pneumatically-operated.

Correct! Wrong!

On ground, the avionics ground cooling system cools the air that is blown in the avionics bay and the cockpit panels. The ground cooling system has two units, one for each avionics ventilation circuit. The two units operate independently. When the GND COOLG AVNCS pb-sw is set to AUTO, the ground cooling system will activate automatically if the temperature of the air is too high, and the air conditioning is OFF. This occurs when Air temperature is:

More than 27 degrees Celsius.

More than 31 degrees Celsius.

At or above 35 degrees Celsius

Correct! Wrong!

There are _____ recirculation fans that recirculate cabin air to the mixer unit

Two.

Three.

Four.

Correct! Wrong!

When the electrical heater switch is at HIGH power, it increases the temperature of the airflow which goes to:

The lateral windows, the lateral individual air outlet and the foot air outlets.

The lateral and forward windows individual air outlet, and the lateral individual air outlet

The lateral windows.

Correct! Wrong!

Avionics Ventilation - The recirculated air is discharged overboard, when:

The aircraft is on ground with engines running.

The aircraft is on ground with engines not running.

The aircraft is on ground with at least one engine running.

Correct! Wrong!

The electrical heater is at HIGH power. The electrical heater increases the temperature of the airflow which goes to:

The lateral window and the lateral individual air outlet.

The lateral window and the foot air outlets.

The lateral window, the lateral individual air outlet, and the foot air outlets.

Correct! Wrong!

There are ____ avionics ventilation circuits:

Two: the left (L) and the right (R) circuit.

Four: they are designed to provide cooled air to the overhead and pedestal panels

Three: the left (L), the right (R) and the standby (STBY)circuit

Correct! Wrong!

Airbus A350 – Ventilation

Quiz

Airbus A350 - Ventilation

Avionics ventilation - Each ventilation circuit has _______ . If the blowing fans cannot correctly cool the avionics bay, the backup valve of the affected circuit automatically opens. This enables air from the air conditioning system, to cool the avionics systems.

A ventilation system cools the two pack bays, and is fully automatic. The pack bay areas are ventilated by external air. In flight, external air flows into each pack bay area, through an air inlet. Both air inlets are:

The batteries are ventilated during the flight by _______ that is extracted and discharged overboard via differential pressure.

The cockpit is automatically ventilated, with air from:

If the electrical heater is at LOW power, it delivers:

The bulk cargo compartment is _______ ventilated.

There are two blowing fans, that blow recirculated air from the cabin in the various cockpit panels and electronic equipment. Each avionics ventilation circuit has one blowing fan. For both avionics ventilation circuits, the air is first filtered, before it enters the blowing fan.

The forward and aft cargo compartments are automatically ventilated, with air from the air-conditioning system. Air flows into the cargo compartments, via:

The avionics ventilation system cools the electrical and electronic equipment in the avionics bay and in the cockpit panels.

Pack bay ventilation - The pack bay areas are ventilated by external air.

Each flight crew can manually adjust the airflow which goes around the onside rudder pedals. The airflow is adjusted with the FOOT VENT selector on the onside CAPT(FO) INDIVIDUAL VENT panel but the temperature of this airflow cannot be increased.

If necessary, the flight crew can manually force the cockpit ventilation.

In flight, when the AVNCS EXTRACT pb-sw on the VENT panel is set to OVRD: the overboard valve partially opens, and air is extracted and discharged through the overboard valve and inboard valve. The inboard valve remains closed only if the extract fans are running.

The batteries are ventilated on ground by cabin air that is extracted and discharged overboard via differential pressure.

Each avionics ventilation circuit has one backup valve. If the blowing fans cannot correctly cool the avionics bay, the backup valve of the affected circuit automatically opens. This enables air from the air conditioning system, to cool the avionics systems.

In some cabin areas (e.g. lavatories, galleys) to avoid bad smells, air is extracted and then directly discharged:

On ground, two blowing fans ventilate both pack bay areas. Bleed air, from any available bleed supply, flows through two supply valves and drives both fans. The ASCU controls the blowing fans that are:

There are _____ recirculation fans that recirculate cabin air to the mixer unit

When the electrical heater switch is at HIGH power, it increases the temperature of the airflow which goes to:

Avionics Ventilation - The recirculated air is discharged overboard, when:

The electrical heater is at HIGH power. The electrical heater increases the temperature of the airflow which goes to:

There are ____ avionics ventilation circuits: