Exercise: Heat Transfer Refrigeration And Air Conditioning

Questions for: Heat Transfer Refrigeration And Air Conditioning

The temperature below which a gas is always liquified, is known as critical temperature.
A:
Correct
B:
Incorrect
C:
D:
Answer: B
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The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by
A:
(C.O.P.)P = (C.O.P.)R + 2
B:
(C.O.P.)P = (C.O.P.)R + 1
C:
(C.O.P)P = (C.O.P)R - 1
D:
(C.O.P)P = (C.O.P)R
Answer: B
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A device used for transfering heat from one fluid to another is called heat exchanger.
A:
True
B:
False
C:
D:
Answer: A
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Wet bulb temperature is the temperature of air recorded by a thermometer, when
A:
it is not effected by the moisture present in the air
B:
its bulb is surrounded by a wet cloth exposed to the air
C:
the moisture present in it begins to condense
D:
none of the above
Answer: B
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In a reversed Brayton cycle, the heat is absorbed by the air during
A:
isentropic compression process
B:
constant pressure cooling process
C:
isentropic expansion process
D:
constant pressure expansion process
Answer: D
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