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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The relative coefficient of performance is

Actual COP × theoretical COP
None of these
Theoretical COP/actual COP
Actual COP/theoretical COP

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

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

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Refrigeration and Air Conditioning
In vapour compression cycle the condition of refrigerant is superheated vapour

Before entering the expansion valve
After passing through the expansion or throttle valve
Before passing through the condenser
After passing through the condenser

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Refrigeration and Air Conditioning
Which of the following cycles uses air as the refrigerant?

Bell Coleman
Stirling
Carnot
Ericson

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Refrigeration and Air Conditioning
The coefficient of performance is the ratio of the refrigerant effect to the

Enthalpy increase in compressor
Work done by compressor
All of these
Heat of compression

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Refrigeration and Air Conditioning
In a reversed Brayton cycle, the heat is absorbed by the air during

Isentropic compression process
Constant pressure expansion process
Constant pressure cooling process
Isentropic expansion process

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