Which of the following substances is normally classified as a low pressure refrigerant?
Official USCG Answer & Rule Citation
Correct Answer: Option C — R-123
R-123 is classified as a low-pressure refrigerant because it operates at or below atmospheric pressure at normal room temperatures, requiring specialized purge units and containment protocols aboard marine vessels.
100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.