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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Equal to
None of the listed here
Greater than
Less than

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Refrigeration and Air Conditioning
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

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

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Refrigeration and Air Conditioning
Highest temperature encountered in refrigeration cycle should be

Near critical temperature of refrigerant
Much below critical temperature
Above critical temperature
At critical Temperature

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Refrigeration and Air Conditioning
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

5
6
1.2
0.2

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Refrigeration and Air Conditioning
During dehumidification process, _________ remains constant.

Relative humidity
Wet bulb temperature
Specific humidity
Dry bulb temperature

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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
Less
Equally

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