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Refrigeration and Air Conditioning

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

Wet bulb temperature
Specific humidity
Dry bulb temperature
Relative humidity

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

Ammonia
R-12
CO?
All of these

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Refrigeration and Air Conditioning
One ton refrigeration corresponds to

80 kcal/ hr
50 kcal/ min
50 kcal/ hr
80 kcal/ min

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Refrigeration and Air Conditioning
A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called

Saturated air
Specific humidity
Dry air
Moist air

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Refrigeration and Air Conditioning
If a gas is to be liquefied, its temperature must be

Increased to a value above its critical temperature
Equal to critical temperature
Reduced to a value below its critical temperature
None of these

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Refrigeration and Air Conditioning
Which of the following refrigerant has the highest freezing point.

Sulphur dioxide
R-12
Carbon dioxide
Ammonia

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