A combustible liquid with a flash point of 90°F would be grade __________.
Official USCG Answer & Rule Citation
Correct Answer: Option C — D
Carrying asphalt or molten sulfur above 300°F creates extreme hazards regarding moisture. Per 46 CFR and safe chemical handling practices, introducing water to extremely hot cargo causes instantaneous flash vaporization. The resulting rapid expansion of steam causes violent tank ruptures, explosive eruptions, or catastrophic pipeline failures.
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