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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The undesirable property of a refrigerant is

Non-flammable
Non-toxic
Non-explosive
High boiling point

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Refrigeration and Air Conditioning
Carbon dioxide is

All of the listed here
Colourless
Odourless
Non-flammable

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Refrigeration and Air Conditioning
Reducing suction pressure in refrigeration cycle

Increases power required per ton of refrigeration
All of these
Lowers evaporation temperature
Lowers compressor capacity because vapour is lighter

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Refrigeration and Air Conditioning
One tonne of refrigeration (1TR) means that the heat removing capacity is

420 kJ/min
21 kJ/min
210 kJ/min
620 kJ/min

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Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Brine
Ammonia
Freon
Carbon dioxide

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Refrigeration and Air Conditioning
The desirable property of a refrigerant is

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

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MORE MCQ ON Refrigeration and Air Conditioning

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