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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Freon group of refrigerants are

Toxic
Nontoxic and non-inflammable
Non-inflammable and toxic
Inflammable

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Refrigeration and Air Conditioning
Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption system

Weak solution to strong solution
Ammonia vapours to weak solution
Strong solution to weak solution
Strong solution to ammonia vapour

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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 dehumidification process, dry bulb temperature

Remains constant
Increases
Decreases
None of these

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Refrigeration and Air Conditioning
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called

Humidity ratio
Relative humidity
Absolute humidity
Degree of saturation

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Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

None of these
Decreases C.O.P.
Increases C.O.P.
Does not alter C.O.P.

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