What is the correct technique for aiming when using a portable extinguisher?

• A. Aim at the base of the fire
• B. Aim at the flames
• C. Aim at the top of the fire
• D. Sweep from side to side while aiming at the smoke

Answer: (A)

Aiming at the base of the fire is essential because you’re targeting the fuel source where the fire is actually burning. The extinguishing agent works best when it reaches the fuel, cooling it and smothering the flame at its source to stop the chemical reactions that keep the fire going. Hitting the flames doesn’t interrupt the burning fuel, so the fire can continue. Aiming at the top of the fire misses the fuel and is ineffective, and aiming at smoke isn’t helpful because smoke is just combustion products, not the fuel you need to cool. After you aim at the base, sweep the nozzle across the area to blanket the base and prevent reignition.