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Multiple Choice

If a pan of hot motor oil is spilled and ignited, what class of fire extinguisher will be needed?

A fire involving a flammable liquid like motor oil requires a Class B extinguisher. These are designed to handle fires where the fuel is a liquid, using methods that smother and cool the liquid to stop vaporization and reignition. The idea behind other classes isn’t suited here: a Class C extinguisher targets electrical fires and won’t effectively suppress a burning oil pool; Class A is for ordinary combustibles (wood, paper), and Class D is for certain metal fires. So for a pan of hot motor oil that’s ignited, the appropriate choice is a Class B extinguisher.

A fire involving a flammable liquid like motor oil requires a Class B extinguisher. These are designed to handle fires where the fuel is a liquid, using methods that smother and cool the liquid to stop vaporization and reignition. The idea behind other classes isn’t suited here: a Class C extinguisher targets electrical fires and won’t effectively suppress a burning oil pool; Class A is for ordinary combustibles (wood, paper), and Class D is for certain metal fires. So for a pan of hot motor oil that’s ignited, the appropriate choice is a Class B extinguisher.