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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The central air conditioning system has ___________ overall efficiency as compared to individual systems.

Same
Higher
Lower
None of these

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Refrigeration and Air Conditioning
In case of sensible cooling of air, the coil efficiency is given by

1 + B.P.F.
P.F. - 1
1 - B.P.F.
1/ B.P.F.

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using ammonia is detected by

All of these
Sulphur sticks
Halide torch
Soap and water

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Refrigeration and Air Conditioning
The process, generally used in summer air conditioning to cool and dehumidify the air, is called

Humidification
Heating and humidification
Dehumidification
Cooling and dehumidification

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Refrigeration and Air Conditioning
Vapour compression refrigeration is somewhat like

Reversed Carnot cycle
None of these
Carnot cycle

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Refrigeration and Air Conditioning
The thermostatic expansion valve is used in ________ type of evaporators.

Flooded
None of these
Dry
DX coil

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