🔍 Key Concepts

• Fire classes and what types of fuel each class involves (A, B, C) • How water fog acts differently from a solid water stream (cooling, smothering, non‑conductive spray) • Which types of fires are dangerous to fight with water because of electrical conductivity or fuel spread

💭 Think About

• Think about what a Class A fire is and whether water (or water fog) is normally recommended for that type of fuel. • Consider what happens if you apply water, even as a fog, to flammable liquids or energized electrical equipment. • Ask yourself: which combination of fire classes can safely and effectively be attacked with water fog without creating extra hazards?

✅ Before You Answer

• Be clear on the definition of Class A, Class B, and Class C fires. • Recall which fire classes must not be fought with plain water because of electrical shock or fuel‑spread risk. • Remember that water fog provides cooling and some smothering, but it is still water and has limits on which fuels/equipment it is safe to use on.