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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Which of the following refrigerant has the highest freezing point.

Carbon dioxide
Sulphur dioxide
R-12
Ammonia

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

CO2
Ammonia
Freon-22
Freon-11

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Refrigeration and Air Conditioning
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

0.2
5
1.2
6

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Refrigeration and Air Conditioning
The coefficient of performance of a domestic refrigerator is ________ as compared to a domestic air-conditioner.

Same
More
None of these
Less

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Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

Increases
None of these
Remains constant
Decreases

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Refrigeration and Air Conditioning
During cooling and dehumidification, dry bulb temperature

Remains constant
None of these
Increases
Decreases

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MORE MCQ ON Refrigeration and Air Conditioning

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