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Refrigeration and Air Conditioning

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 heat rejection factor (HRF) is given by

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

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Refrigeration and Air Conditioning
On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process

Involves no change in volume
Takes place at constant pressure
Takes place at constant temperature
Takes place at constant entropy

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Refrigeration and Air Conditioning
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Increase
Remain unaffected
Decrease
May increase or decrease depending on the type of refrigerant used

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Refrigeration and Air Conditioning
The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P.

Unpredictable
More
Equally
Less

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Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

Remains constant
Decreases
None of these
Increases

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