What is the difference between Class A fires and Class B fires in ARFF terms?

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Multiple Choice

What is the difference between Class A fires and Class B fires in ARFF terms?

Explanation:
Fire classifications in ARFF are about what fuels are burning and that guides how you fight the fire. Class A fires involve ordinary combustibles—things like wood, paper, cloth, and many textiles. These burn with a steady flame and typically leave ashes. Class B fires involve flammable liquids, such as aviation fuel, gasoline, oils, and solvents. Liquids can spread and form a fuel layer, so they require extinguishing methods that blanket or isolate the fuel and prevent reignition. So the statement that ordinary combustibles are Class A and flammable liquids like aviation fuel are Class B is the right one because it matches how ARFF groups fuels for dispatching the right suppressants and tactics. The other options mix in metals or electrical fires (which belong to other classes) or suggest plastics in a way that doesn’t reflect the standard ARFF classification.

Fire classifications in ARFF are about what fuels are burning and that guides how you fight the fire. Class A fires involve ordinary combustibles—things like wood, paper, cloth, and many textiles. These burn with a steady flame and typically leave ashes. Class B fires involve flammable liquids, such as aviation fuel, gasoline, oils, and solvents. Liquids can spread and form a fuel layer, so they require extinguishing methods that blanket or isolate the fuel and prevent reignition.

So the statement that ordinary combustibles are Class A and flammable liquids like aviation fuel are Class B is the right one because it matches how ARFF groups fuels for dispatching the right suppressants and tactics. The other options mix in metals or electrical fires (which belong to other classes) or suggest plastics in a way that doesn’t reflect the standard ARFF classification.

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