Refrigeration and air-conditioning objective questions and answers

41. Horse power per ton of refrigeration is expressed as.......

   A.4.75/COP

   B.COP/4.75

   C.4.75 x COP

   D.47.5/COP

42. The value of COP in vapour compressure cycle is usually.......

   A.Always less than unity

   B.Always greater than unity

   C.Equal to unity

   D.None of the above

43. In refrigeration cycle,the flow of refrigerant is controlled by ....

   A.Condenser

   B.Compressor

   C.Evaporator

   D.Expansion valve

   D.None of the above

44. Where does the lowest temperature occures in vapour compression cycle?.......

   A.Condenser

   B.Compressor

   C.Evaporator

   D.Expansion valve

   D.None of the above

45. Ammonia is a.......

   A.Non-toxic

   B.Non-inflammable

   C.Toxic and Non-inflammable

   D.Highly toxic and inflammable

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