Part66EASA Module11A.4.1 Air Supply

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Syllabus: 11.4 Air Conditioning and Cabin Pressurisation (ATA 21) 11.4.1 Air supply Sources of air supply including engine bleed, APU and ground cart;

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A spill valve opens.
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1 point

Option A. to prevent an excessive pressure difference.

Option B. to control the flow to the cabin.

Option C. to control the air from the cabin to outside.

Which of the following can be used on the ground?.
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Option A. Turbo fan.

Option B. Turbo compressor.

Option C. Turbo brake.

What is the minimum cabin air mass flow?.
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Option A. 1 lbs per minute per person.

Option B. 0.5 lbs per minute per person.

Option C. 10 lbs per minute per person.

The function of an air mass flow control valve is to.
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Option A. control the airflow out of the cabin.

Option B. maintain a reasonably constant air mass flow into the cabin at all altitudes.

Option C. ensure that system differential pressure is not exceeded.

Air supplied for pressurisation and conditioning is
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Option A. the same for both the above sources.

Option B. hottest from an engine compressor bleed.

Option C. hottest from a compressor driven by an engine gear box.

The mass flow delivery from engine driven blowers is controlled by.
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Option A. automatic control devices.

Option B. engine speed variations.

Option C. spill valves.

The function of spill valves is to control.
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Option A. air supply to the cabin.

Option B. cabin pressure differential.

Option C. the rate of pressurisation.

The purpose of a 'Spill' valve in a cabin air supply system is.
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Option A. to relieve the pressure in the air supply ducting to atmosphere.

Option B. to give a heating effect.

Option C. to spill overboard excess air delivered at S.L. and lower altitudes.

The function of the mass airflow control valve is to.
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Option A. ensure system operating pressure is not exceeded.

Option B. maintain a reasonable mass flow of air into the cabin irrespective of aircraft altitude.

Option C. ensure that constant airflow out of the cabin is dictated by cabin altitude.

In a Bleed Air air-conditioning system, the warm air supply is provided by.
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Option A. the compressor of the gas turbine engine.

Option B. the gas turbine exhaust.

Option C. the engine exhaust heat.

In most pressurization systems, the amount of compressed air delivered to the cabin is.
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Option A. reasonably constant irrespective of altitude.

Option B. constant at any particular altitude but varies for different altitudes.

Option C. variable, depending on the amount selected by the cabin rate of change selector.

The purpose of a mass flow controller is to.
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Option A. ensure that a constant mass of air is delivered to cabin at all times.

Option B. allow pilot to select the desired cabin altitude.

Option C. ensure the cabin altitude remains constant during cruise at all altitudes.

How much air is required for the Flight Deck?.
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Option A. Whatever the captain sets.

Option B. 10 lbs/minute.

Option C. 10 cubic feet/minute.

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