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Refrigeration and Air Conditioning

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

Increases
Decreases
Remains constant
None of these

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

-107.7°C
-86.6°C
-135.8°C
-95.2°C

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Refrigeration and Air Conditioning
The specific humidity during humidification process

Increases
Remains constant
Decreases
None of these

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Refrigeration and Air Conditioning
R-12 is generally preferred over R-22 in deep freezers since

It is miscible with oil over large range of temperatures
All of these
It gives higher coefficient of performance
It has low operating pressures

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Refrigeration and Air Conditioning
In vapour compression cycle the condition of refrigerant is superheated vapour

After passing through the expansion or throttle valve
After passing through the condenser
Before passing through the condenser
Before entering the expansion valve

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Refrigeration and Air Conditioning
The evaporator changes the low pressure liquid refrigerant from the expansion valve into

High pressure liquid refrigerant
Low pressure liquid and vapour refrigerant
None of these
Low pressure vapour refrigerant

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MORE MCQ ON Refrigeration and Air Conditioning

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