Florida Fire State Practice Exam 2025 – All-in-One Study Guide to Master Your Certification!

Class B foam performs the function of smothering and extinguishing fires, particularly those involving flammable liquids such as gasoline, oils, and solvents. The foam effectively forms a blanket over the burning liquid, cutting off the oxygen supply necessary for combustion and thereby suppressing the flames. This action not only helps to extinguish the fire but also prevents the flammable vapors from escaping and igniting again, which is crucial in maintaining safety at the scene of a fire.

In this context, while other options describe different functions that various materials or substances might perform, they do not specifically align with the fire suppression properties of Class B foam. Understanding the correct function of Class B foam is vital for effectively managing fires involving flammable liquids and ensuring the safety of both firefighters and the surrounding environment.