When using a fire extinguisher, where should you aim?

• A. At the top of the flames for maximum effect.
• B. At the base of the flames from a safe position, sweeping side-to-side.
• C. Directly at the fuel source only.
• D. From a distance, spray the plume into the flames.

Answer: (B)

The key idea is to interrupt the fire at its source. You aim at the base of the flames from a safe distance and sweep the nozzle from side to side. Pushing the extinguishing agent at the base targets the fuel that is feeding the fire, cooling or smothering it and breaking the chemical reaction so the fire cannot continue. Sweeping across the base ensures you treat the whole area and reduces the chance of re-ignition. Aiming at the top of the flames or only at the visible flame tips often misses the fuel and lets the fire keep burning, and spraying from a distance without directing at the base can miss the critical area. Keep a steady stance, maintain your distance, and sweep until the fire is out or help arrives.