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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

quiet operation
cooling below 0°C
very little power consumption
noisy operation

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Refrigeration and Air Conditioning
The vapour pressure of refrigerant should be

Lower than atmospheric pressure
Could be anything
Equal to atmospheric pressure
Higher than atmospheric pressure

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Refrigeration and Air Conditioning
In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at

Delivery of compressor
High pressure side close to receiver
Low pressure side near receiver
Suction of compressor

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Refrigeration and Air Conditioning
One tonne of refrigeration (1TR) means that the heat removing capacity is

21 kJ/min
620 kJ/min
210 kJ/min
420 kJ/min

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Refrigeration and Air Conditioning
The refrigerant for a refrigerator should have

Low latent heat
High sensible heat
High latent heat
High total heat

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 - (1/C.O.P)
1 + (1/C.O.P)
1 + C.O.P
1 - C.O.P.

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MORE MCQ ON Refrigeration and Air Conditioning

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