Exercise: Heat Transfer Refrigeration And Air Conditioning

Questions for: Heat Transfer Refrigeration And Air Conditioning

The material of pipe lines for a system using freon as a refrigerant should be
A:
brass
B:
copper
C:
steel
D:
aluminium
Answer: B
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In aircraft, air refrigeration Cycle is used because of
A:
low weight per tonne of refrigeration
B:
high heat transfer rate
C:
low temperature at high altitudes
D:
higher coefficient of performance
Answer: A
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The capillary tube, as an expansion device, is used in
A:
domestic refrigerators
B:
water coolers
C:
room air conditioners
D:
all of these
Answer: D
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The specific humidity during cooling and dehumidification
A:
remains constant
B:
increases
C:
decreases
D:
Answer: C
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In figure shown, E is a heat engine with efficiency of 0.4 and R is a refrigerator. It is given that Q2 + Q4 = 3Q1. The C.O.P. of the refrigerator is
A:
2.5
B:
3.0
C:
4.0
D:
5.0
Answer: D
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