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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
Dry bulb depression
Wet bulb depression
Dew point depression

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

Sulphur dioxide
Carbon dioxide
R-12
Ammonia

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Refrigeration and Air Conditioning
The desirable property of a refrigerant is

Low boiling point
High critical temperature
High latent heat of vaporisation
All of these

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Refrigeration and Air Conditioning
In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is

Cooled and humidified
Cooled and dehumidified
Heated and humidified
Heated and dehumidified

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Refrigeration and Air Conditioning
Vertical lines on pressure-enthalpy chart show constant

Pressure lines
Total heat lines
Temperature lines
Entropy lines

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Refrigeration and Air Conditioning
The freezing point of R-12 is

-135.8°C
-86.6°C
-107.7°C
-95.2°C

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MORE MCQ ON Refrigeration and Air Conditioning

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