All fire extinguishers are labeled using stan-dard symbols for the classes of fires they can put out. A red slash through any of the symbols means the extinguisher can-not be used on that class of fire. A mis-sing symbol means the extinguisher has not been tested for a given class of fire. The extinguisher must be appropriate for the type of fire being fought. If you use the wrong type of extinguisher, you can endanger yourself and make the fire worse.
Extinguishers require routine care.
Make sure the Fire Department has been called. Make sure the fire is confined and not spreading. Be sure you have an unobstructed escape route. Be sure you know how to use the extinguisher. It is reckless to fight a fire in any other circumstances.