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Refrigeration and Air Conditioning

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

None of these
Increases
Decreases
Remains constant

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Refrigeration and Air Conditioning
In a domestic vapour compression refrigerator, the refrigerant commonly used is

R-12
All of these
CO?
Ammonia

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Refrigeration and Air Conditioning
The undesirable property of a refrigerant is

Non-explosive
Non-toxic
High boiling point
Non-flammable

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Refrigeration and Air Conditioning
The superheated vapour region, in a pressure enthalpy chart, is represented by the space

To the right of saturated liquid line
Between the saturated liquid line and saturated vapour line
To the left of saturated liquid line
None of these

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is high pressure saturated liquid

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

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Refrigeration and Air Conditioning
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

Lack of cooling water
Water temperature being high
All of these
Dirty condenser surface

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