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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The specific humidity during cooling and dehumidification

None of these
Decreases
Remains constant
Increases

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Refrigeration and Air Conditioning
The boiling point of ammonia is

-30°C
-33.3°C
-77.7°C
-10.5°C

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant before passing through the condenser is

Saturated liquid
Wet vapour
Superheated vapour
Dry saturated vapour

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

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

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Refrigeration and Air Conditioning
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

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

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Refrigeration and Air Conditioning
When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding will be

Positive
Zero
None of the listed here
Negative

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