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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The difference between dry bulb temperature and wet bulb temperature, is called

Degree of saturation
Dew point depression
Dry bulb depression
Wet bulb depression

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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
The process, generally used in summer air conditioning to cool and dehumidify the air, is called

Dehumidification
Humidification
Heating and humidification
Cooling and dehumidification

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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

2.33
3.33
4.33
1.33

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

None of these
Specific
Absolute
Relative

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Refrigeration and Air Conditioning
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

Any value
High, of the order of 25°
Zero
As low as possible (3 to 11°C)

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