Exercise: Heat Transfer Refrigeration And Air Conditioning

Questions for: Heat Transfer Refrigeration And Air Conditioning

In aqua-ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in
A:
condenser
B:
evaporator
C:
absorber
D:
none of these
Answer: A
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The average value of thermal conductivity for water at 20° C saturate is about 0.51.
A:
True
B:
False
C:
D:
Answer: A
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In a shell and tube heat exchanger, baffles are provided on the shell side to
A:
improve heat transfer
B:
provide support for tubes
C:
prevent stagnation of shell side fluid
D:
all of these
Answer: D
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A refrigerant with the highest critical pressure is
A:
R-11
B:
R-12
C:
R-22
D:
Ammonia
Answer: D
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A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be
A:
1/4
B:
1/3
C:
3
D:
4
Answer: D
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