Aircraft Systems Quiz

What is the purpose of the pack RAM AIR flaps?

• To ensure cabin ventilation in case both packs fail.

• To provide air to the pack compressor.

• To modulate the main air flow through the heat exchangers.

• To regulate the cabin pressure.

In a turbo fan cold air system, the heat exchanger cooling air is.

• ram air from ambient conditions.

• air bled directly from engine or through blower.

• bled from cabin air supply duct.

• compressed air from the APU.

The function of each pack controller is to ensure:

• The air flow regulation and basic temperature controls.

• The air flow regulation control only.

• The regulation of cabin lighting.

• The fine adjustment of the temperature control by add hot air.

An air cycle machine turbine.

• drives compressor to increase temperature.

• drives compressor to pressurise aircraft.

• drives compressor to decrease temperature.

• drives compressor to increase pressure.

The purpose of the safety valves is to avoid:

• Excessive temperature differential.

• Excessive negative pressure differential.

• Excessive positive pressure differential.

• A and B.

In pressurized aircraft, temperature conditioning is mainly achieved by.

• varying cabin pressure.

• extracting heat from the pressurising air.

• adding heat to the pressurising air.

• adjusting the oxygen levels.

The cabin altitude is.

• the equivalent height of the aircraft above sea level.

• the actual height of the aircraft above sea level.

• the difference between cabin pressure and atmospheric pressure.

• the pressure inside the cabin.

The outflow of air from the cabin is regulated by.

• the air conditioning packs.

• the dump control valves.

• the outflow valves.

• the vent valves.

The purpose of a mechanical sequence valve is to ensure the operation of.

• landing gear and doors.

• safety switches.

• primary flight controls.

• brake anti-skid units.

The purpose of a non-return valve is to.

• direct fluid to the hydraulic actuator.

• restrict the movement of components.

• prevent reverse flow of fluid.

• isolate one component from another.