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Mechanical Engineering Objective Questions { Refrigeration and AC }

22. The refrigerant for a refrigerator should have
A.High sensible heat
B.High total heat
C.High latent heat
D.Low latent heat

23. Rating of a domestic refrigerator is of the order of
A.0.1 ton
B.5 tons
C.10 tons
D.40 tons

24. The COP of a domestic refrigerator
A.Is less than 1
B.Is more than U.
C.Is equal to 1
D.Depends upon the make

25. The domestic refrigerator uses following tjpe of compressor
C.Miniature sealed unit
D.Piston type reciprocating--

26. Refrigeration in aeroplanes usually employs the following refrigerant

27. Domestic refrigerator working on vapour compression cycle uses the following type of expansion device
A.Electrically operated throttling valve
B.Manually operated valve
C.Thermostatic valve
D.Capillary tube

28. Air refrigeration operates on
A.Carnot cycle
B.Brayton cycle.
C.Rankine cycle
D.Erricson cycle

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