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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Superheating in a refrigeration cycle

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

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Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

20°C
10°C
15°C
5°C

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Refrigeration and Air Conditioning
During adiabatic saturation process on unsaturated air ___ remains constant.

Wet bulb temperature
Dry bulb temperature
Dew point temperature
Relative humidity

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Refrigeration and Air Conditioning
The bank of tubes at the back of domestic refrigerator is

Refrigerant cooling tubes
Condenser tubes
Capillary tubes
Evaporator tubes

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Refrigeration and Air Conditioning
The refrigerant supplied to a compressor must be

None of these
A mixture of liquid and vapour refrigerant
Superheated vapour refrigerant
Dry saturated liquid refrigerant

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Refrigeration and Air Conditioning
Air conditioning means

Cooling
Heating
All of these
Dehumidifying

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