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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The pressure at the outlet of a refrigerant compressor is called

Critical pressure
Discharge pressure
Back pressure
Suction pressure

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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 dehumidified
Cooled and dehumidified
Cooled and humidified
Heated and humidified

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Refrigeration and Air Conditioning
The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents

Condensation of the refrigerant vapour
Evaporation of the refrigerant liquid
Compression of the refrigerant vapour
Metering of the refrigerant liquid

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Refrigeration and Air Conditioning
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Remain unaffected
Increase
May increase or decrease depending on the type of refrigerant used
Decrease

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Refrigeration and Air Conditioning
The temperature of ammonia after compression in a vapour compression system is

None of these
70 to 110°C
50 to 70°C
20 to 50°C

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

Low
Optimum
Any value
High

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MORE MCQ ON Refrigeration and Air Conditioning

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