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
Which of the following statement is wrong?

The value of C.O.P. is always greater than one
In a vapour compression system, the condition of refrigerant before entering the compressor is dry saturated vapour
The space between the saturated liquid line and saturated vapour line, in a pressure enthalpy chart, is wet vapour region
None of the listed here

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