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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?

Ammonia
Carbon dioxide
Sulphur dioxide
Fluorine

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Refrigeration and Air Conditioning
The air cooling system mostly used in transport type aircrafts is

All of the listed here
Bootstrap air cooling system
Simple air cooling system
Simple evaporative air cooling system

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Refrigeration and Air Conditioning
Critical temperature is the temperature above which

Water will evaporate
A gas will immediately liquefy
A gas will never liquefy
Water will never evaporate

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Refrigeration and Air Conditioning
The refrigerant for a refrigerator should have

High latent heat
Low latent heat
High sensible heat
High total heat

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Refrigeration and Air Conditioning
The specific humidity during cooling and dehumidification

Decreases
None of these
Remains constant
Increases

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Refrigeration and Air Conditioning
The value of C.O.P in vapour compression cycle is usually

Any one of the above
Equal to unity
Always less than unity
Always more than unity

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