Refrigeration and air-conditioning objective questions and answers

26. One tonne of refrigeration corresponds to.......

   A.50 kcal/min

   B.50 kcal/kr

   C.80 kcal/min

   D.80 kcal/kr

   E.100 kcal/day

27. The S.I. unit of one tonne refrigeration is equal to.......

   A.210 kj/min

   B.21 kj/min

   C.420 kj/min

   D.840 kj/min

   E.105 kj/min

28. One tonne of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice ....

   A.In one hour

   B.In one munite

   C.In 24 hours

   D.In 12 hours

   E.In 10 hours

29. Which of the following cycles uses air as the refrigerant.......

   A.Carnot

   B.Stirling

   C.Ericsson

   D.Bell-coleman

   E.After passing through the expansion or throttle valve

30. In vapour compression refrigeration cycle is somewhat like.......

   A.Carnot cycle

   B.Rankine cycle

   C.Reversed carnot cycle

   D.Reversed rankine cycle

   E.None of the above

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