Refrigeration and air-conditioning objective questions and answers


16. In air-conditioning of aeroplanes,using air as refrigerant,the cycle is used is.......


   A.Reversed carnot cycle

   B.Reversed joule cycle

   C.Reversed Brayton cycle

   D.Reversed Otto cycle


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C.Reversed Brayton cycle

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17. The relative coefficient of performance ( C.O.P.)is equal to.......


   A.Theoritical C.O.P./Actual C.O.P.

   B.Actual C.O.P./Theoritical C.O.P.

   C.Theoritical C.O.P. x Actual C.O.P.

   D.None of the above


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B.Actual C.O.P./Theoritical C.O.P.

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18. The sub-cooling in a refrigeration cycle ....


   A.Does not alter C.O.P.

   B.Increases C.O.P.

   C.Decreases C.O.P.

   C.None of the above


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B.Increases C.O.P.

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19. The highest temperature during the cycle,in a vapour compression system,occures after .......


   A.Compression

   B.Condensation

   C.Expansion

   C.Evaporation


✔ View Answer


A.Compression

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20. In a vapour compression system,the lowest temperature during the cycle occures after.......


   A.Compression

   B.Condensation

   C.Expansion

   C.Evaporation


✔ View Answer


D.Evaporation

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