For protecting against liquid fires, which extinguisher type is not suitable?

For protecting against liquid fires, which extinguisher type is not suitable?

• A. Foam
• B. Water
• C. AFFF
• D. Dry Chemical

Answer: (B)

Water extinguishers are not suitable for protecting against liquid fires, specifically flammable liquids and oils. When water is used on such fires, it can cause the burning liquid to spread, as water can mix with some flammable liquids, leading to an increased risk of fire and hazard. Water may also create a mist that can spread the fire or propagate flames, rather than extinguishing them. In contrast, other extinguisher types, like foam and AFFF (Aqueous Film Forming Foam), are particularly effective for liquid fires as they create a barrier between the fire and the fuel source, smothering the flames and preventing re-ignition. Dry chemical extinguishers are similarly designed to interrupt the chemical reaction of the fire, making them versatile and effective for a variety of fire types, including ones involving liquids.

Water extinguishers are not suitable for protecting against liquid fires, specifically flammable liquids and oils. When water is used on such fires, it can cause the burning liquid to spread, as water can mix with some flammable liquids, leading to an increased risk of fire and hazard. Water may also create a mist that can spread the fire or propagate flames, rather than extinguishing them.

In contrast, other extinguisher types, like foam and AFFF (Aqueous Film Forming Foam), are particularly effective for liquid fires as they create a barrier between the fire and the fuel source, smothering the flames and preventing re-ignition. Dry chemical extinguishers are similarly designed to interrupt the chemical reaction of the fire, making them versatile and effective for a variety of fire types, including ones involving liquids.