Flashcards on Aircraft Pressurization, Oxygen, and Air Conditioning
Aircraft Pressurization, Oxygen, & Air Conditioning Explained
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Aircraft Cabin Environmental Systems
22 cards
Card 1
Question: What are the two main gases that make up our atmosphere?
Answer: Nitrogen and oxygen.
Card 2
Question: Why are the cabins of most turbine-powered aircraft pressurized?
Answer: They fly at altitudes where occupants would need supplemental oxygen if cabins were not pressurized.
Card 3
Question: Where does pressurizing air come from on most turbine-powered aircraft?
Answer: Air bled from one of the engine compressors.
Card 4
Question: Where does the pressurizing air come from on most smaller reciprocating-engine-powered aircraft?
Answer: From the engine turbocharger.
Card 5
Question: What determines the amount of pressurization an aircraft can use?
Answer: The structural strength of the aircraft cabin.
Card 6
Question: Why must air cycle air conditioning systems incorporate a water separator?
Answer: Rapid cooling in the expansion turbine causes moisture to condense as fog, which must be trapped by a moisture separator before air is released into t
Card 7
Question: What refrigerant is used in a vapor-cycle air conditioning system?
Answer: Freon liquid refrigerant known as Refrigerant 12 or the more environmentally friendly R-134a.
Card 8
Question: What are three ways supplemental oxygen can be carried in an aircraft?
Answer: As a high-pressure gas, in liquid form, and as a solid chemical candle.
Card 9
Question: What kind of gaseous oxygen must be used to service an aircraft oxygen system?
Answer: Only aviators' breathing oxygen; hospital and welding oxygen contain too much moisture.
Card 10
Question: What is used to check an aircraft oxygen system for leaks?
Answer: A special leak detector liquid (a form of nonoily soap).