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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The relative coefficient of performance is

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

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Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

Less than
More than
None of these
Equal to

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Refrigeration and Air Conditioning
Superheating in a refrigeration cycle

Decreases C.O.P
O.P remains unaltered
Other factors decide C.O.P
Increases C.O.P

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Refrigeration and Air Conditioning
A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

High side float valve
Low side float valve
Automatic expansion valve
Thermostatic expansion valve

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is very wet vapour

After passing through the condenser
Before entering the compressor
After passing through the expansion or throttle valve
Before passing through the condenser

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Refrigeration and Air Conditioning
The pressure at the outlet of a refrigerant compressor is called

Critical pressure
Discharge pressure
Suction pressure
Back pressure

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MORE MCQ ON Refrigeration and Air Conditioning

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