AFFF is used primarily on what class of fires?

AFFF is used primarily on what class of fires?

• A. Alpha (Water)
• B. BRAVO (Fuel/liquid)
• C. Charlie (Electrical)
• D. Delta (Metal)

Answer: (B)

AFFF is designed to fight fires involving flammable liquids. It works by forming a stable, thin film on the surface of the liquid, creating a barrier between the fuel and the air while the foam blankets and cools the fuel. This film reduces vapor release and helps prevent reignition, making it particularly effective for hydrocarbon fuels like gasoline, diesel, and solvents. It’s not the best choice for ordinary solid-fuel fires, electrical fires (where nonconductive agents and de-energizing the circuit are preferred), or metal (Class D) fires, which require different extinguishing methods. So, AFFF is used primarily on fuel/liquid fires.

AFFF is designed to fight fires involving flammable liquids. It works by forming a stable, thin film on the surface of the liquid, creating a barrier between the fuel and the air while the foam blankets and cools the fuel. This film reduces vapor release and helps prevent reignition, making it particularly effective for hydrocarbon fuels like gasoline, diesel, and solvents. It’s not the best choice for ordinary solid-fuel fires, electrical fires (where nonconductive agents and de-energizing the circuit are preferred), or metal (Class D) fires, which require different extinguishing methods. So, AFFF is used primarily on fuel/liquid fires.