This depresses a button that releases pressurized extinguishing agent in the extinguisher. Sweep from side to side. Do this until the fire is completely out. Start using the extinguisher from a safe distance away, them move forward. Once the fire is out, keep an eye on the area in case it re-ignites.
Theory is great, but there is no substitute for hands-on expereince.
To complete this Fire Extinguisher Training, please take the Quiz .