Which of the following best describes the types of combustible materials addressed by Class B fire extinguishers?

Class B fire extinguishers are specifically designed to combat fires fueled by flammable liquids and gases. This classification is essential because combustible materials like gasoline, oils, paints, and solvents can easily ignite and generate highly flammable vapors, posing significant risks in various environments, such as industrial sites, garages, and laboratories.

Understanding that Class B extinguishers use agents such as foam, CO2, or dry chemical agents to effectively smother flames is critical for proper firefighting techniques. These extinguishers work by interrupting the chemical reaction of the fire or displacing oxygen, which distinguishes their use from extinguishing other types of fires, such as those involving ordinary combustibles, electrical equipment, or metals.

Each class of fire has unique characteristics and requires specific extinguishing methods, making it vital for personnel to be informed about their correct applications to ensure safety and effectiveness during firefighting efforts.