Engine Refrigeration (Supplementary) USCG Q#385 (Set 6)

What is the color coding for a storage container of R-134a refrigerant?

Official USCG Answer & Rule Citation

Correct Answer: Option D — light blue

AHRI Guideline N establishes standardized cylinder color coding for refrigerants. Containers holding HFC-134a are specifically designated with a light blue color scheme to prevent cross-contamination and ensure proper identification.

All Engine Refrigeration (Supplementary) Sets Practice Set 6