According to Coast Guard Regulations (46 CFR), a flammable liquid with a Reid vapor pressure of 8 1/2 psi or less, and a flash point of 80°F or below, is a grade __________.

Official USCG Answer & Rule Citation

Correct Answer: Option C — C

Per 46 CFR 30.10-22, Grade C combustible liquids are defined as having a Reid vapor pressure of 8.5 psi or less and a flash point of 80°F or below. This classification is vital for determining proper stowage, handling, and fire protection requirements for hazardous liquid cargoes on tank vessels.

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