🔍 Key Concepts

• Foam application techniques on flammable liquid (Class B) fires • Effect of direct foam impact on burning oil surfaces • How foam blankets work to smother and contain oil fires

💭 Think About

• Think about what happens to burning oil if you hit it hard with a stream—does it stay still or move? • How does a foam blanket actually put out an oil fire: by cooling, by excluding oxygen, by preventing vapors from forming, or something else? • What does ‘banking off’ a bulkhead do to the speed and force of the foam stream before it reaches the burning surface?

✅ Before You Answer

• Identify how agitation of burning liquid affects fire spread • Recall that foam on oil fires should usually be applied gently, not driven directly into the liquid • Decide which option best matches the goal of forming a stable foam blanket over the surface of the burning oil