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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

4.33
3.33
1.33
2.33

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Refrigeration and Air Conditioning
The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure, is called

Degree of saturation
Absolute humidity
Relative humidity
Humidity ratio

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Refrigeration and Air Conditioning
Cooling water is required for following equipment in ammonia absorption plant

Condenser
Evaporator
Condenser, absorber and separator (rectifier)
Absorber

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Refrigeration and Air Conditioning
The specific humidity during humidification process

None of these
Increases
Decreases
Remains constant

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Refrigeration and Air Conditioning
Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

Increase
None of these
Reduce
Equalize

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Refrigeration and Air Conditioning
The wet bulb depression indicates _________ humidity of the air.

Specific
None of these
Absolute
Relative

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