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

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

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Refrigeration and Air Conditioning
The bypass factor of a cooling coil decreases with

Increase in fin spacing and increase in number of rows
Decrease in fin spacing and increase in number of rows
Decrease in fin spacing and decrease in number of rows
Increase in fin spacing and decrease in number of rows

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