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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A refrigerant with the highest critical pressure is

R-22
R-12
R-11
Ammonia

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Refrigeration and Air Conditioning
During adiabatic saturation process on unsaturated air ___ remains constant.

Dry bulb temperature
Wet bulb temperature
Dew point temperature
Relative humidity

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Refrigeration and Air Conditioning
The higher temperature in vapour compression cycle occurs at

Receiver
Evaporator
Expansion valve
Compressor discharge

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

Remains constant
Increases
None of these
Decreases

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Refrigeration and Air Conditioning
In Electrolux refrigerator

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

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Refrigeration and Air Conditioning
Which of the following cycles uses air as the refrigerant?

Ericson
Carnot
Stirling
Bell Coleman

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