When using foam, a "Class B" fire is...

Question 1 of 270705eccef9ebacbc34ba4d4626b

When using foam, a "Class B" fire is extinguished by __________.

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Question 1 of 27070

Q

When using foam, a "Class B" fire is extinguished by __________.

🔍 Key Concepts

• Class B fires involve flammable liquids like gasoline or oil • How foam fire extinguishers actually stop combustion • The basic fire tetrahedron: heat, fuel, oxygen, and chemical reaction

💭 Think About

• Think about what a foam blanket does when it sits on top of burning fuel. What is it blocking or changing? • For a Class B liquid fire, which method is most effective: reducing heat, separating fuel from air, or swapping out the fuel? • Does foam primarily cool the burning liquid, or does it act more like a lid on a pot?

✅ Before You Answer

• Recall what the main action of foam is on a liquid surface • Check which option best matches the idea of forming a blanket over the fuel • Be sure your choice fits specifically for Class B (flammable liquid) fires, not all fire types in general