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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In larger industrial and commercial reciprocating compression systems, refrigerant widely used is

Carbon dioxide
Ammonia
Sulphur dioxide
R-12

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Refrigeration and Air Conditioning
The condition of refrigerant as it leaves the compressor in a vapour compression system is

Wet vapour
Dry saturated vapour
Saturated liquid
Superheated vapour

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Refrigeration and Air Conditioning
A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg)

100 kJ/kg
50 kJ/kg
25 kJ/kg
125 kJ/kg

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

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

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Refrigeration and Air Conditioning
A vapour absorption refrigerator uses _________ as a refrigerant.

Freon
Aqua-ammonia
Water
Ammonia

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Refrigeration and Air Conditioning
The humidification process, on the psychrometric chart is shown by

Vertical line
Inclined line
Curved line
Horizontal line

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MORE MCQ ON Refrigeration and Air Conditioning

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