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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An Electrolux refrigerator is called a ___ absorption system.

None of the listed here
Two fluids
Three fluids
Single fluid

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Refrigeration and Air Conditioning
In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the

Condenser to the expansion valve
Condenser to the evaporator
Expansion valve to the evaporator
Evaporator to the thermostat

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Refrigeration and Air Conditioning
One of the purposes of sub cooling the liquid refrigerant is to

Reduce compressor overheating
Increase cooling effect
Ensure that only liquid and not the vapour enters the expansion (throttling) valve
Reduce compressor discharge temperature

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Refrigeration and Air Conditioning
Critical temperature is the temperature above which

Water will never evaporate
A gas will never liquefy
Water will evaporate
A gas will immediately liquefy

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Refrigeration and Air Conditioning
The humidity ratio or specific humidity is the mass of water vapour present in

1 m3 of dry air
1 m3 of wet air
1 kg of wet air
1 kg of dry air

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

Less than
Greater than
Equal to
None of the listed here

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