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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

21 kJ/ min
210 kJ/ min
840 kJ/ min
420 kJ/ min

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Refrigeration and Air Conditioning
One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice

In 24 hours
In 12 hours
In 1 hour
In 1 minute

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Refrigeration and Air Conditioning
Formation of frost on evaporator in refrigerator

Can be avoided by proper design
Increases heat transfer rate
Results in loss of heat due to poor heat transfer
Is immaterial

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Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/h
m/hK
m²/hK
m/h

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Refrigeration and Air Conditioning
The thermostatic expansion valve operates on the changes in the

Pressure in the evaporator
Temperature of the evaporator
Degree of superheat at exit from the evaporator
None of these

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Refrigeration and Air Conditioning
In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in

None of these
Condenser
Absorber
Evaporator

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