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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The undesirable property of a refrigerant is

Non-explosive
Non-flammable
Non-toxic
High boiling point

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Refrigeration and Air Conditioning
Condensing temperature in a refrigerator is the temperature

At which refrigerant gas becomes liquid
Of cooling medium
Of evaporator
Of freezing zone

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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

Negative
Positive
Zero
None of the listed here

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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

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

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Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

Remains constant
Increases
Decreases
None of these

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Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

210 kJ/ min
21 kJ/ min
840 kJ/ min
420 kJ/ min

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