Combustible liquids are divided into how many grades?
Official USCG Answer & Rule Citation
Correct Answer: Option B — Two
Under 46 CFR 30.10-15, combustible liquids are divided into exactly two grades: Grade D (flashpoint above 80°F but below 150°F) and Grade E (flashpoint of 150°F or above). This classification dictates the safety and handling requirements for these cargoes.
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