Refrigeration and air-conditioning objective questions and answers

46. The most suitable refrigerant of a commercial ice plant.......

   A.Brine

   B.NH₃

   C.Freon

   D.Air

47. Moisture in a refrigerant system is removed by.......

   A.Driers

   B.Filter-driers

   C.Dessicants

   D.All of the above

48. Under cooling in a refrigeration cycle....

   A.Increases COP

   B.Decreases COP

   C.COP remains unaltered

   D.Other factor decided COP

   D.None of the above

49. For obtaining high COP,the pressure range of compressor should be.......

   A.High

   B.Low

   C.Optimum

   D.Any value

50. The refrigerator which does not require compressor is called.......

   A.Vapour absorption refrigerator

   B.Vapour compression refrigerator

   C.Electrolux refrigerator

   D.Carnot refrigerator

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