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Discussion :: Refrigeration and Air Conditioning

  1. Air refrigeration cycle is used in

    2. A.

     Domestic refrigerators
    B.

     Commercial refrigerators
    C.

     Air conditioning
    D.

     Gas liquefaction

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    Answer : Option D

    Explanation :

    The processes are used for scientific, industrial and commercial purposes. Many gases can be put into a liquid state at normal atmospheric pressure by simple cooling; a few, such as carbon dioxide, require pressurization as well.
    At ambient pressure the boiling point of liquefied helium is 4.22 K

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