There are ______ classes of fire extinguishers

There are ______ classes of fire extinguishers

• A. three
• B. seven
• C. five
• D. four

Answer: (C)

Extinguishers are categorized by the type of fire they’re designed to fight. In modern practice there are five classes: A for ordinary combustibles like wood, paper, and textiles; B for flammable liquids like gasoline and solvents; C for energized electrical equipment; D for combustible metals such as magnesium or titanium; and K for cooking oils and fats used in commercial kitchens. This five-class system helps you pick the right extinguisher for a given fire and avoid using one that could be ineffective or dangerous. Some older schemes used fewer categories, but the complete standard recognizes five to cover a broader range of fire hazards.

Extinguishers are categorized by the type of fire they’re designed to fight. In modern practice there are five classes: A for ordinary combustibles like wood, paper, and textiles; B for flammable liquids like gasoline and solvents; C for energized electrical equipment; D for combustible metals such as magnesium or titanium; and K for cooking oils and fats used in commercial kitchens. This five-class system helps you pick the right extinguisher for a given fire and avoid using one that could be ineffective or dangerous. Some older schemes used fewer categories, but the complete standard recognizes five to cover a broader range of fire hazards.