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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Carbon dioxide is

All of the listed here
Odourless
Non-flammable
Colourless

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Refrigeration and Air Conditioning
In mechanical refrigeration system, the refrigerant has the maximum temperature

Between condenser and evaporator
Before expansion valve
In evaporator
Between compressor and condenser

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Refrigeration and Air Conditioning
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

1.2
6
0.2
5

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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
In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by

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

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Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Freon
Brine
Carbon dioxide
Ammonia

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MORE MCQ ON Refrigeration and Air Conditioning

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