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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

Remains constant
Decreases
None of these
Increases

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Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

None of these
Decreases
Increases
Remains constant

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Refrigeration and Air Conditioning
A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

3 kW
2 kW
1 kW
4 kW

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Refrigeration and Air Conditioning
Moisture should be removed from refrigerants to avoid

Corrosion of steel plates
All of these
Restriction to refrigerant flow
Freezing at the expansion valve

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Refrigeration and Air Conditioning
In Electrolux refrigerator

Ammonia evaporates in hydrogen
Ammonia is absorbed in hydrogen
Ammonia is absorbed in water
Hydrogen evaporates in ammonia

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Refrigeration and Air Conditioning
For obtaining high COP, the pressure range of compressor should be

Low
Optimum
High
Any value

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MORE MCQ ON Refrigeration and Air Conditioning

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