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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The specific humidity during heating and humidification process.

Increases
Decreases
None of these
Remains constant

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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
Less
More
Equally

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

None of the listed here
Less than
Equal to
Greater than

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Refrigeration and Air Conditioning
In a domestic vapour compression refrigerator, the refrigerant commonly used is

Ammonia
CO?
All of these
R-12

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Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

None of these
Increases
Remains constant
Decreases

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Refrigeration and Air Conditioning
The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

1.86 kW
18.6 kW
7.44 kW
3.72 kW

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