Which of the following refrigerants is chlorine free and safe regarding atmospheric ozone depletion?
Official USCG Answer & Rule Citation
Correct Answer: Option D — R-134a
HFC-134a contains no chlorine atoms, possessing an ozone depletion potential (ODP) of zero. Complying with EPA Section 608 and international marine environmental protection standards, it serves as a chlorine-free replacement for ozone-depleting CFCs.
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