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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
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

43834
43833
3
4

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 + (1/C.O.P)
1 - C.O.P.
1 + C.O.P
1 - (1/C.O.P)

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Refrigeration and Air Conditioning
For air conditioning the operation theater in a hospital, the percentage of outside air in the air supplied is

50
100
20
Zero

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Refrigeration and Air Conditioning
The domestic refrigerator uses following type of compressor

Piston type reciprocating
Centrifugal
Axial
Miniature sealed unit

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Refrigeration and Air Conditioning
While designing the refrigeration system of an aircraft, the prime consideration is that the

Mass of refrigerant circulated in the system is low
Mass of the refrigeration equipment is low
System has high C.O.P.
Power per TR is low

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Refrigeration and Air Conditioning
The temperature of ammonia after compression in a vapour compression system is

70 to 110°C
20 to 50°C
50 to 70°C
None of these

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MORE MCQ ON Refrigeration and Air Conditioning

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