Class A foams are intended for use on:

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Multiple Choice

Class A foams are intended for use on:

Class A foams are designed to fight fires involving ordinary combustibles such as wood, paper, and textiles. They work by wetting and cooling the fuel, and by forming a permeable film that blankets the surface and penetrates porous materials, helping to separate the fuel from the air and prevent reignition. This makes them best suited for fires of solid fuels. They aren’t intended for noncombustibles, since those materials don’t burn and don’t require the foam’s cooling or sealing action. They also aren’t for flammable liquids, which require Class B foams that are formulated to blanket liquids and reduce vapor release, or for flammable gases, where different tactics are used.

Class A foams are designed to fight fires involving ordinary combustibles such as wood, paper, and textiles. They work by wetting and cooling the fuel, and by forming a permeable film that blankets the surface and penetrates porous materials, helping to separate the fuel from the air and prevent reignition. This makes them best suited for fires of solid fuels. They aren’t intended for noncombustibles, since those materials don’t burn and don’t require the foam’s cooling or sealing action. They also aren’t for flammable liquids, which require Class B foams that are formulated to blanket liquids and reduce vapor release, or for flammable gases, where different tactics are used.

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