Question 249 Deck General

The correct answer is A) class of fire and size of the extinguisher. The letter and number symbols used to classify portable fire extinguishers, such as B-II, indicate the class of fire the extinguisher is rated for (the letter) and the size or capacity of the extinguisher (the number). The letter refers to the type of fire, with A for ordinary combustibles, B for flammable liquids and gases, and C for energized electrical equipment. The number indicates the relative size of the extinguisher, with higher numbers representing larger capacity units. So a B-II extinguisher is rated for Class B (flammable liquids and gases) fires and is a medium-sized unit. The other answer choices are incorrect because they do not accurately describe the meaning of the letter and number symbols on portable fire extinguishers.