Refrigeration and Air Conditioning
In a psychrometric chart, specific humidity (moisture content) lines are

Curved lines
Vertical and uniformly spaced
Horizontal and uniformly spaced
Horizontal and non-uniformly spaced

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

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

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