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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Equal to
Greater than
Less than
None of the listed here

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

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

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Refrigeration and Air Conditioning
The condition of refrigerant as it leaves the compressor in a vapour compression system is

Saturated liquid
Superheated vapour
Wet vapour
Dry saturated vapour

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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
As relative humidity decreases, the dew point temperature will be ___ wet bulb temperature.

None of the listed here
Lower than
Same as
Higher than

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Refrigeration and Air Conditioning
A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

Automatic expansion valve
Low side float valve
Thermostatic expansion valve
High side float valve

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