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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Which of the following is not a desirable property of a refrigerant?

Good electrical conductor
High risibility with oil
Large latent heat
Low boiling point

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Refrigeration and Air Conditioning
The central air conditioning system has ___________ overall efficiency as compared to individual systems.

Lower
None of these
Higher
Same

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

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

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Refrigeration and Air Conditioning
The evolution of heat of solution takes place in ammonia absorption plant when

Lithium bromide mixes with ammonia
Weak solution mixes with strong solution
Ammonia vapour is driven out of solution
Ammonia vapour goes into solution

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Refrigeration and Air Conditioning
For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be

Anything
High
Equal
Small

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Refrigeration and Air Conditioning
The process, generally used in winter air-conditioning to warm and humidity the air, is called

Heating and humidification
Dehumidification
Humidification
Cooling and dehumidification

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MORE MCQ ON Refrigeration and Air Conditioning

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