Which of the following substances is normally classified as a low pressure refrigerant?
Official USCG Answer & Rule Citation
Correct Answer: Option B — R-123
R-123 is classified as a low-pressure refrigerant due to its boiling point and operating pressures, which remain below atmospheric pressure at normal ambient conditions, requiring specialized purge units on chillers.
100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.