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Mechanical Engineering Objective Questions { Refrigeration and Air Conditioning }

29. Air refrigeration cycle is used in
A.Domestic refrigerators
B.Commercial refrigerators
C.Air conditioning
D.Gas liquefaction
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30. In a vapour compression cycle, the refrigerant immediately after expanc;on valve is
B.Sub-cooled liquid
C.Saturated liquid
D.Wet vapour
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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
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32. For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be
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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
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34. The higher temperature in vapour compression cycle occurs at
B.Compressor discharge.
D.Condenser discharge
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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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