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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant

remains same
depends on other factors
decreases
increases

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Refrigeration and Air Conditioning
In aircraft, air refrigeration Cycle is used because of

Higher coefficient of performance
Low temperature at high altitudes
High heat transfer rate
Low weight per tonne of refrigeration

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Refrigeration and Air Conditioning
The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is

More
Same
More or less depending on ambient conditions
Less

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Refrigeration and Air Conditioning
In Electrolux refrigerator

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

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Refrigeration and Air Conditioning
The temperature of ammonia after compression in a vapour compression system is

None of these
70 to 110°C
50 to 70°C
20 to 50°C

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Refrigeration and Air Conditioning
The humidification process, on the psychrometric chart is shown by

Vertical line
Horizontal line
Inclined line
Curved line

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MORE MCQ ON Refrigeration and Air Conditioning

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