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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

Decreases
Remains constant
Increases
None of these

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Refrigeration and Air Conditioning
The freezing point of R-12 is

-86.6°C
-95.2°C
-107.7°C
-135.8°C

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Refrigeration and Air Conditioning
The refrigerant supplied to a compressor must be

Dry saturated liquid refrigerant
None of these
Superheated vapour refrigerant
A mixture of liquid and vapour refrigerant

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Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Cools below 0°C
Requires little power consumption
Gives noisy operation
Gives quiet operation

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Refrigeration and Air Conditioning
During a refrigeration cycle, heat is rejected by the refrigerant in a

Compressor
Condenser
Evaporator
Expansion valve

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Refrigeration and Air Conditioning
Highest pressure encountered in a refrigeration system should be

Critical pressure of refrigerant
Much below critical pressure
Near critical pressure
Much above critical pressure

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