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Refrigeration and Air Conditioning

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

Increases
Remains constant
None of these
Decreases

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Refrigeration and Air Conditioning
If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be

More
Same
Less
More/less depending on rating

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Refrigeration and Air Conditioning
The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called

Dew point temperature
None of these
Dry bulb temperature
Wet bulb temperature

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Refrigeration and Air Conditioning
During sensible cooling,

Wet bulb temperature increases
Specific humidity increases
Partial pressure of vapour remains constant
Relative humidity remains constant

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

CO?
R-12
Ammonia
All of these

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Refrigeration and Air Conditioning
Which of the following refrigerants has lowest freezing point?

Freon-12
NH3
Freon-22
CO2

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