Which class involves flammable and combustible liquids and gases such as gasoline, oil, lacquer?

Which class involves flammable and combustible liquids and gases such as gasoline, oil, lacquer?

• A. Class A Fires
• B. Class K Fires
• C. Class D Fires
• D. Class B Fires

Answer: (D)

Fires driven by flammable liquids and vapors require a different approach because the fuel source is a liquid or vapor that can spread quickly and continue burning even when a small amount is released. This is what defines Class B fires. Gasoline, oil, lacquer and other solvents fall into this category, since their ignition and spread depend on the presence of liquid fuel or its vapors rather than solid fuels. Knowing this helps you choose the right extinguisher and strategy: you typically use agents like foam, dry chemical, or carbon dioxide that interrupt the chemical reaction or separate the fuel from the air, and you generally avoid straight water because it can spread the flammable liquid and make the fire worse. Other fire classes cover different fuels: ordinary combustibles like wood or paper, electrical fires, or metal fires. The scenario described clearly aligns with flammable liquids and vapors, placing it in Class B.

Fires driven by flammable liquids and vapors require a different approach because the fuel source is a liquid or vapor that can spread quickly and continue burning even when a small amount is released. This is what defines Class B fires. Gasoline, oil, lacquer and other solvents fall into this category, since their ignition and spread depend on the presence of liquid fuel or its vapors rather than solid fuels.

Knowing this helps you choose the right extinguisher and strategy: you typically use agents like foam, dry chemical, or carbon dioxide that interrupt the chemical reaction or separate the fuel from the air, and you generally avoid straight water because it can spread the flammable liquid and make the fire worse.

Other fire classes cover different fuels: ordinary combustibles like wood or paper, electrical fires, or metal fires. The scenario described clearly aligns with flammable liquids and vapors, placing it in Class B.