Test on Aircraft Pressurization, Oxygen, and Air Conditioning

Aircraft Pressurization, Oxygen, & Air Conditioning Explained

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Question 1 of 50%

Aircraft oxygen bottles must have the identification DOT 3AA or DOT 3HT stamped on them, along with the date of manufacture and the date of all hydrostatic tests.

Test: Aircraft Environmental Control Systems

20 questions

Question 1: Aircraft oxygen bottles must have the identification DOT 3AA or DOT 3HT stamped on them, along with the date of manufacture and the date of all hydrostatic tests.

A. Ano

B. Ne

Explanation: Oxygen bottles carried in an aircraft must be stamped with the identification DOT 3AA or DOT 3HT, the date of manufacture, and the date of all hydrostatic tests.

Question 2: A standard soapy water solution is used to check an aircraft oxygen system for leaks.

A. Ano

B. Ne

Explanation: A special leak detector liquid, which is a form of nonoily soap, is used to check an oxygen system for leaks, not a standard soapy water solution.

Question 3: In a vapor-cycle air conditioning system, heat from the aircraft cabin is given up to the outside air in the evaporator.

A. Ano

B. Ne

Explanation: The cabin heat is absorbed by the refrigerant in the evaporator, and it is carried outside the aircraft where it is given up to the outside air in the condenser.

Question 4: A pressure-demand oxygen system continuously flows a metered amount of oxygen into the mask.

A. Ano

B. Ne

Explanation: A pressure-demand oxygen system flows oxygen to the mask only when the wearer of the mask inhales.

Question 5: The cabin pressure safety valve prevents cabin pressure from exceeding the maximum allowable differential pressure.

A. Ano

B. Ne

Explanation: The cabin pressure safety valve prevents cabin pressure from exceeding the maximum allowable differential pressure.