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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Chaperon equation is applicable for registration at

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

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Refrigeration and Air Conditioning
Which of the following refrigerant is highly toxic and flammable?

Carbon dioxide
Sulphur dioxide
Ammonia
R-12

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Refrigeration and Air Conditioning
Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

Reduce
Equalize
Increase
None of these

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Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

1: 3
1: 9
9: 1
1: 1

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Refrigeration and Air Conditioning
The bank of tubes at the back of domestic refrigerator is

Condenser tubes
Capillary tubes
Refrigerant cooling tubes
Evaporator tubes

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Refrigeration and Air Conditioning
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

Heated and dehumidified
Cooled and dehumidified
Cooled and humidified
Heated and humidified

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