Florida Fire State Practice Exam

What rating is used for portable fire extinguishers based on the area of flammable liquid a non-expert can extinguish?

1. Class A Rating

2. Class B Rating

3. Class C Rating

4. Class D Rating

The correct answer is: Class B Rating

Portable fire extinguishers are rated based on the type of fire they are effective against and the conditions under which a non-expert user can safely use them. The Class B rating specifically pertains to extinguishers that are designed to combat flammable liquid fires, such as those caused by gasoline, oils, and paints. This rating indicates the amount of flammable liquid fire that the extinguisher can extinguish, measured in square feet. A Class B rated extinguisher is meant for fires involving flammable liquids, where non-experts can manage the risks associated with these types of fires, ensuring they can react effectively without special training. This distinguishes it from other classes, as Class A is for ordinary combustibles like wood and paper, Class C is for electrical fires, and Class D is for combustible metals, which each have their own specific user guidelines and applications. Thus, the Class B rating establishes a standard for safety and effectiveness in addressing the unique challenges posed by flammable liquid fires, making it the correct answer.