How do extinguishers work?
It depends on the extinguisher. Most have a release lever and a pin of some sort. In the event of a fire, make sure your back is to an exit where you can get out. Stand at least 6 feet back from the fire and do the following:
Release the lever. If it has a pin, pull it.
Aim the extinguisher at the base of the fire, not the top of the flame.
Squeeze the lever about the handle or press the button Releasing the pressure stops the extinguisher.
Sweep the extinguisher from side to side. As you move toward the fire, continue to aim at the base until the flames appear to be out. Be very careful. Fires can re-ignite.
Just remember "PASS." Pull the pin. Aim the extinguisher. Squeeze the lever. Sweep the extinguisher from side to side.