Exercise: Heat Transfer Refrigeration And Air Conditioning

Questions for: Heat Transfer Refrigeration And Air Conditioning

The water, alcohol and ammonia have same refrigerating effect at different altitudes.
A:
Yes
B:
No
C:
D:
Answer: B
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The centrifugal compressors are generally used for refrigerants that require
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: D
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The temperature of ammonia after compression in a vapour compression system is
A:
20 to 50° C
B:
50 to 70° C
C:
70 to 110° C
D:
none of these
Answer: C
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The relative humidity decreases as air gets wet.
A:
True
B:
False
C:
D:
Answer: A
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A water cooled condenser operates at a __________ condensing temperature than an air-cooled condenser.
A:
higher
B:
lower
C:
D:
Answer: B
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