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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Ammonia is

Highly toxic and inflammable
Toxic and non-inflammable
Non-inflammable
Non-toxic

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Refrigeration and Air Conditioning
One of the purposes of sub cooling the liquid refrigerant is to

Reduce compressor discharge temperature
Increase cooling effect
Reduce compressor overheating
Ensure that only liquid and not the vapour enters the expansion (throttling) valve

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Refrigeration and Air Conditioning
The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called

Relative coefficient of performance
Refrigerating efficiency
Coefficient of performance of refrigeration
Coefficient of performance of heat pump

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Refrigeration and Air Conditioning
Chaperon equation is applicable for registration at

Saturation point of liquid
Saturation point of vapour
Sublimation temperature
Triple point

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Refrigeration and Air Conditioning
One ton refrigeration corresponds to

80 kcal/ hr
50 kcal/ min
50 kcal/ hr
80 kcal/ min

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Refrigeration and Air Conditioning
Freon group of refrigerants are

Non-inflammable and toxic
Nontoxic and non-inflammable
Inflammable
Toxic

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MORE MCQ ON Refrigeration and Air Conditioning

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