Which type of fire extinguisher is typically used for fires caused by flammable liquids?

The foam extinguisher is specifically designed to combat fires caused by flammable liquids, such as gasoline or oil. It works by creating a barrier between the fuel and the fire, effectively smothering the flames and preventing the release of flammable vapors. The foam forms a blanket over the burning liquid, which not only extinguishes the fire but also helps to prevent re-ignition.

Water-based extinguishers are not effective on flammable liquid fires, as they can spread the burning liquid and worsen the situation. Class A fire extinguishers are primarily suited for ordinary combustibles like wood, paper, and textiles, rather than flammable liquids. Dry chemical extinguishers can indeed be used for a variety of fires, including flammable liquids, but foam extinguishers are specifically engineered for this type of fire, making them a preferred choice in many firefighting scenarios.