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Refrigeration and Air Conditioning

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

R-12
Sulphur dioxide
Lithium bromide
Carbon dioxide

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Refrigeration and Air Conditioning
During adiabatic saturation process on unsaturated air ___ remains constant.

Dew point temperature
Dry bulb temperature
Relative humidity
Wet bulb temperature

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Refrigeration and Air Conditioning
The dehumidification process, on the psychrometric chart, is shown by

Curved line
Inclined line
Horizontal line
Vertical line

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Refrigeration and Air Conditioning
The advantage of dry compression is that

All of these
It permits complete evaporation in the evaporator
It permits higher speeds to be used
It results in high volumetric and mechanical efficiency

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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

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

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Refrigeration and Air Conditioning
The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is

Bigger
Equal
Smaller
Smaller/bigger depending on capacity

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