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Refrigeration and Air Conditioning

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

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

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Refrigeration and Air Conditioning
A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called

Specific humidity
Saturated air
Moist air
Dry air

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Refrigeration and Air Conditioning
On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process

Takes place at constant pressure
Involves no change in volume
Takes place at constant entropy
Takes place at constant temperature

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Refrigeration and Air Conditioning
In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at

Low pressure side near receiver
Delivery of compressor
High pressure side close to receiver
Suction of compressor

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Refrigeration and Air Conditioning
Moisture in Freon refrigeration system causes

High power consumption
Corrosion of whole system
Freezing automatic regulating valve
Ineffective refrigeration

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Refrigeration and Air Conditioning
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of

Brass
Aluminium
Steel
Copper

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MORE MCQ ON Refrigeration and Air Conditioning

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