A flammable liquid having a Reid vapor pressure of 8½ P.S.I.A. or less and a flash point of 80°F or below is grade __________.

Correct Answer: Option C — C

Under 46 CFR 30.10-22, flammable liquids are classified by Reid vapor pressure (RVP) and flash point. Grade C flammable liquids are defined as having an RVP of 8.5 pounds per square inch absolute (P.S.I.A.) or less and a flash point of 80°F or below.