Which class of fire involves liquids?

Which class of fire involves liquids?

• A. Class A Fire
• B. Class B Fire
• C. Class C Fire
• D. Class D Fire

Answer: (B)

Fires are grouped by the type of fuel and how you fight them. When the fuel is a liquid, such as gasoline, kerosene, or solvents, the fire is Class B. The reason is the flame comes from vapors that evaporate from the liquid and can travel across surfaces, so simply pouring water on it often isn’t effective and can spread the liquid or cause splashing. Fighting these fires targets the fuel itself and the vapor: using foam or other agents that blanket the liquid surface to cut off contact with air, using dry chemical powders to interrupt the chemical reactions, or employing CO2 in enclosed spaces to displace oxygen. Fires of ordinary combustibles like wood and paper are Class A; fires from energized electrical equipment are Class C; and fires from certain combustible metals are Class D.

Fires are grouped by the type of fuel and how you fight them. When the fuel is a liquid, such as gasoline, kerosene, or solvents, the fire is Class B. The reason is the flame comes from vapors that evaporate from the liquid and can travel across surfaces, so simply pouring water on it often isn’t effective and can spread the liquid or cause splashing. Fighting these fires targets the fuel itself and the vapor: using foam or other agents that blanket the liquid surface to cut off contact with air, using dry chemical powders to interrupt the chemical reactions, or employing CO2 in enclosed spaces to displace oxygen.

Fires of ordinary combustibles like wood and paper are Class A; fires from energized electrical equipment are Class C; and fires from certain combustible metals are Class D.