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Refrigeration and Air Conditioning

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

Discharge pressure
Back pressure
Suction pressure
Critical pressure

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Refrigeration and Air Conditioning
The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called

Refrigerating efficiency
Relative coefficient of performance
Coefficient of performance of heat pump
Coefficient of performance of refrigeration

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Refrigeration and Air Conditioning
The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which each constituent would exert, if it occupied the same space by itself. This statement is called

Avogadro's hypothesis
Dalton's law of partial pressures
Kinetic theory of gases
Newton's law of gases

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Refrigeration and Air Conditioning
During a refrigeration cycle, heat is rejected by the refrigerant in a

Condenser
Compressor
Expansion valve
Evaporator

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Refrigeration and Air Conditioning
One of the purposes of sub cooling the liquid refrigerant is to

Ensure that only liquid and not the vapour enters the expansion (throttling) valve
Reduce compressor overheating
Reduce compressor discharge temperature
Increase cooling effect

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Refrigeration and Air Conditioning
Most air cooled condensers are designed to operate with a temperature difference of

14°C
8°C
5°C
22°C

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MORE MCQ ON Refrigeration and Air Conditioning

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