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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Which of the following is not a desirable property of a refrigerant?

Low boiling point
Good electrical conductor
Large latent heat
High risibility with oil

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Refrigeration and Air Conditioning
In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is

More than 10 kg
There is no such consideration
Less than 2 kg
More than or equal to 3.65 kg

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Refrigeration and Air Conditioning
During sensible cooling,

Relative humidity remains constant
Partial pressure of vapour remains constant
Wet bulb temperature increases
Specific humidity increases

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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

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

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Refrigeration and Air Conditioning
For obtaining high COP, the pressure range of compressor should be

Low
Any value
High
Optimum

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Refrigeration and Air Conditioning
In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by

Generator
Absorber and generator
Absorber, generator and liquid pump
Liquid pump

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