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Mechanical Engineering Objective Questions { Refrigeration and AC }



29. Air refrigeration cycle is used in
A.Domestic refrigerators
B.Commercial refrigerators
C.Air conditioning
D.Gas liquefaction

30. In a vapour compression cycle, the refrigerant immediately after expanc;on valve is
A.Liquid
B.Sub-cooled liquid
C.Saturated liquid
D.Wet vapour

31. The vapour pressure of refrigerant should be
A.Lower than atmospheric pressure
B.Higher than atmospheric pressure
C.Equal to atmospheric pressure
D.Could be anything

32. For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be
A.Small
B.High
C.Euqal
D.Anything

33. The bank of tubes at the back of domestic refrigerator are
A.Condenser tubes
B.Evaporator tubes
C.Refrigerant cooling tubes
D.Capillary tubes

34. The higher temperature in vapour compression cycle occurs at
A.Receiver
B.Compressor discharge.
C.Evaporator
D.Condenser discharge

35. Highest temperature encountered in refrigeration cycle should be
A.Near critical temperature- of refrigerant
B.Above critical temperature
C.At criticl.. temperature
D.Much below critical temperature

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