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


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B.NH3

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


   A.Driers

   B.Filter-driers

   C.Dessicants

   D.All of the above


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D.All of the above

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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


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A.Increases COP

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


   A.High

   B.Low

   C.Optimum

   D.Any value


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B.Low

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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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C.Electrolux refrigerator

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