What rating does a portable fire extinguisher have that is based on the square foot area of flammable liquid a nonexpert operator can extinguish?

A portable fire extinguisher with a Class B rating is specifically designed for use on fires involving flammable liquids, such as oil, gasoline, and some chemicals. The rating reflects the ability of the extinguisher to control and extinguish fires in a given area of flammable liquid, which is critical for nonexpert operators who may not have extensive training in fire suppression techniques. The Class B rating is often determined based on how many square feet of a flammable liquid fire the extinguisher can effectively extinguish. This is an essential distinction because proper identification of the fire class ensures that operators select the right type of extinguisher for the emergency they are facing, ultimately leading to more effective fire suppression and safety.