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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?

Carbon dioxide
Fluorine
Ammonia
Sulphur dioxide

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Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

None of the listed here
Greater than
Equal to
Less than

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Refrigeration and Air Conditioning
The desirable property of a refrigerant is

High latent heat of vaporisation
All of these
High critical temperature
Low boiling point

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Refrigeration and Air Conditioning
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

6
1.2
5
0.2

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Refrigeration and Air Conditioning
The difference between dry bulb temperature and dew point temperature, is called

Wet bulb depression
Degree of saturation
Dry bulb depression
Dew point depression

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Refrigeration and Air Conditioning
In Electrolux refrigerator

Hydrogen evaporates in ammonia
Ammonia is absorbed in hydrogen
Ammonia evaporates in hydrogen
Ammonia is absorbed in water

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