Question 1087 Deck General

The correct answer is B) Two. Combustible liquids are divided into two grades according to the United States Coast Guard regulations. Grade C includes liquids with a flashpoint at or above 100°F, while Grade B includes liquids with a flashpoint below 100°F but above 80°F. This two-grade classification is based on the flammability and hazard level of the liquids, with Grade B being more flammable and hazardous than Grade C. The other answer choices are incorrect because the regulations do not define one, three, or four grades of combustible liquids. The two-grade system is the standard classification used for these types of hazardous materials on vessels.