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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 + (1/C.O.P)
1 - C.O.P.
1 + C.O.P
1 - (1/C.O.P)

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Refrigeration and Air Conditioning
Critical pressure of a liquid is the pressure

Above which liquid becomes vapour
Above which liquid becomes solid
Above which liquid becomes gas
Above which liquid will remain liquid

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Refrigeration and Air Conditioning
In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in

Absorber
Evaporator
None of these
Condenser

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is___ dry bulb temperature.

None of the listed here
Lower than
Same as
Higher than

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Refrigeration and Air Conditioning
In Electrolux refrigerator

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

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Refrigeration and Air Conditioning
During heating and humidification, the final relative humidity of air

Can be lower or higher than that of the entering air
Is higher than that of the entering air
Is lower than that of the entering air
None of the listed here

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