Refrigeration and Air Conditioning
The advantage of dry compression is that

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

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Refrigeration and Air Conditioning
Dry bulb temperature is the temperature of air recorded by a thermometer, when

None of the listed here
Its bulb is surrounded by a wet cloth exposed to the air
It is not affected by the moisture present in the air
The moisture present in it begins to condense

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Refrigeration and Air Conditioning
The general rule for rating refrigeration systems (excepting for CO₂ system) is to approximate following h.p. per ton of refrigeration

0.1 to 0.5 h.p. per ton of refrigeration
2 to 5 h.p. per ton of refrigeration
1 to 2 h.p. per ton of refrigeration
0.5 to 0.8 h.p. per ton of refrigeration

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