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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Which of the following refrigerant has the lowest freezing point?

R-22
R-12
Ammonia
R-11

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Refrigeration and Air Conditioning
During humidification process, __________ increases.

Dry bulb temperature
Relative humidity
Wet bulb temperature
Specific humidity

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Refrigeration and Air Conditioning
In larger industrial and commercial reciprocating compression systems, refrigerant widely used is

R-12
Carbon dioxide
Sulphur dioxide
Ammonia

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Refrigeration and Air Conditioning
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and

Sulphur dioxide
Lithium bromide
Carbon dioxide
R-12

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Refrigeration and Air Conditioning
The relative coefficient of performance is

None of these
Actual COP/theoretical COP
Theoretical COP/actual COP
Actual COP × theoretical COP

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Refrigeration and Air Conditioning
The refrigerant for a refrigerator should have

High total heat
High sensible heat
High latent heat
Low latent heat

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