Fire extinguishers are hand-held pressurized units that contain an agent to fight fire – which might be a chemical, foam, or water. They are usually marked for fighting 4 different fire types, including the following:
- Type A Fire: Which is composed of such ordinary combustible materials like paper and wood
- Type B Fire: Comprised of flammable liquids like grease or gasoline
- Type C Fire: Involves such electrical equipment as circuit breakers and appliances
- Type D Fire: This includes combustible metals and chemicals, and is usually found in chemical labs and industrial facilities.