Question 35Refrigeration & AC - QMED
70% to passWhich of the following refrigerants is chlorine free and safe regarding atmospheric ozone depletion?
AR-11
BR-12
CR-22
DR-134a
AI Explanation
The correct answer is D) R-134a. R-134a is a chlorine-free refrigerant that is considered safe for the ozone layer. Unlike R-11 and R-12, which contain chlorine and are known to deplete the ozone, R-134a is an ozone-friendly hydrofluorocarbon (HFC) refrigerant. R-22, another common refrigerant, does contain chlorine and is being phased out due to its ozone-depleting properties.
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