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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The relative coefficient of performance is

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

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

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

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Refrigeration and Air Conditioning
The specific humidity during heating and humidification process.

None of these
Remains constant
Increases
Decreases

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Refrigeration and Air Conditioning
The alignment circle is marked on the psychrometric chart at

20°C DBT and 50% RH
20°C DBT and 60% RH
26°C DBT and 60% RH
26°C DBT and 50% RH

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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
The wet bulb temperature during sensible cooling of air

Remains constant
Decreases
Increases
None of these

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