Exercise: Heat Transfer Refrigeration And Air Conditioning

Questions for: Heat Transfer Refrigeration And Air Conditioning

The undesireable property of a refrigerant is
A:
non-toxic
B:
non-flammable
C:
non-explosive
D:
high boiling point
Answer: D
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In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about
A:
1
B:
1.25
C:
2.15
D:
5.12
Answer: B
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During sensible cooling of air, the relative humidity increases.
A:
Yes
B:
No
C:
D:
Answer: A
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Which of the following refrigerant has the lowest boiling point?
A:
Ammonia
B:
Carbon dioxide
C:
Sulphur dioxide
D:
R-12
Answer: B
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In order to collect liquid refrigerant and to prevent it from going to a __________ , a device known as accumulator is used at the suction of compressor.
A:
compressor
B:
condenser
C:
expansion valve
D:
evaporator
Answer: A
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