Which of the following is a correct example of a Class B fire?

• A. Burning Paper
• B. Gasoline Spill
• C. Electrical Wiring
• D. Metal Dust

Answer: (B)

Class B fires involve flammable liquids and fuels. The hazard comes from the liquid’s vapors and any liquid pool that can keep burning, so the extinguishing approach targets the liquid itself. Gasoline is a quintessential flammable liquid, so a gasoline spill clearly demonstrates a Class B fire scenario. Water should be avoided on these fires because it can spread the flammable liquid and push the fire to more areas; instead, use extinguishing agents suitable for flammable liquids (such as dry chemical, foam, or CO2) andContain or absorb the spill as appropriate. In contrast, burning paper is an example of an ordinary combustibles fire (Class A), electrical wiring fires are Class C, and metal dust fires are Class D.