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Refrigeration and Air Conditioning

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

Decreases
Increases
None of these
Remains constant

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Refrigeration and Air Conditioning
The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which each constituent would exert, if it occupied the same space by itself. This statement is called

Kinetic theory of gases
Newton's law of gases
Avogadro's hypothesis
Dalton's law of partial pressures

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Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Commercial refrigerators
Air conditioning
Gas liquefaction
Domestic refrigerators

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Refrigeration and Air Conditioning
Highest pressure encountered in a refrigeration system should be

Much below critical pressure
Much above critical pressure
Near critical pressure
Critical pressure of refrigerant

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Refrigeration and Air Conditioning
A vapour absorption refrigerator uses _________ as a refrigerant.

Ammonia
Freon
Aqua-ammonia
Water

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Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

Equal to
None of these
More than
Less than

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