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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

4
43833
3
43834

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Refrigeration and Air Conditioning
In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is

Cooled and humidified
Cooled and dehumidified
Heated and humidified
Heated and dehumidified

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Refrigeration and Air Conditioning
Ammonia absorption refrigeration cycle requires

Nearly same work input as for vapour compression cycle
Maximum work input
Zero work input
Very little work input

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Refrigeration and Air Conditioning
The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to

Orange
Yellow
Bright green
Red

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Refrigeration and Air Conditioning
Allowable pressure on high pressure side or ammonia absorption system is of the order of

56 bars
24 bars
Atmospheric pressure
Slightly above atmospheric pressure

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Refrigeration and Air Conditioning
The operating pressure for refrigerating units using R-12 as a refrigerant is

2 bar
30 bar
15 bar
8 bar

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