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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The relative coefficient of performance is

Actual COP × theoretical COP
None of these
Theoretical COP/actual COP
Actual COP/theoretical COP

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Refrigeration and Air Conditioning
Refrigeration in aeroplanes usually employs the following refrigerant

Freon-11
CO2
Freon-22
Air

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Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

Does not alter C.O.P.
Increases C.O.P.
Decreases C.O.P.
None of these

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Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Carbon dioxide
Freon
Brine
Ammonia

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Refrigeration and Air Conditioning
R-12 is generally preferred over R-22 in deep freezers since

It is miscible with oil over large range of temperatures
It has low operating pressures
It gives higher coefficient of performance
All of these

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Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Requires little power consumption
Cools below 0°C
Gives quiet operation
Gives noisy operation

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MORE MCQ ON Refrigeration and Air Conditioning

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