Refrigeration and Air Conditioning
In a saturated air-water vapour mixture, the

Dry bulb, wet bulb and dew point temperature are same
Dry bulb temperature is higher than dew point temperature
Dry bulb temperature is higher than wet bulb temperature
Dew point temperature is lower than wet bulb temperature

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Refrigeration and Air Conditioning
Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since

These react with ozone layer
These react with oxygen and cause its depletion
These react with water vapour and cause acid rain
These react with plants and cause greenhouse effect

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