Exercise: Heat Transfer Refrigeration And Air Conditioning

Questions for: Heat Transfer Refrigeration And Air Conditioning

The mass of water vapour present in __________ is called absolute humidity.
A:
1 m3 of wetair
B:
1 m3 of dry air
C:
1 kg of wet air
D:
1 kg of dry air
Answer: B
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The boiling point of carbon dioxide is
A:
-20.5°C
B:
-50°C
C:
-63.3°C
D:
-78.3°C
Answer: D
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The reciprocating refrigerant compressors are very suitable for
A:
small displacements and low condensing pressures
B:
large displacements and high condensing pressures
C:
small displacements and high condensing pressures
D:
large displacements and low condensing pressures
Answer: C
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Air refrigerator works on
A:
reversed Carnot cycle
B:
Bell Coleman cycle
C:
both (a) and ib)
D:
none of these
Answer: C
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The ratio of heat extracted in the refrigerator to the workdone on the refrigerant is called
A:
coefficient of performance of refrigeration
B:
coefficient of performance of heat pump
C:
relative coefficient of performance
D:
refrigerating efficiency
Answer: A
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