Some fire extinguishers have liquid; some have solids; some have compressed gas; some have combinations of gas, liquids and solids.
Liquid
Use a foam extinguisher to smother the fire without spreading it.
Burning liquid fires require a U.L. Class B fire extinguisher, or ABC, or BC.
foam, NOT LIQUID
When a liquid fire extinguisher has a hose, the stream of liquid coming from the hose is called the "hose stream" and can be directed at the base of the flames.
The gas becomes a liquid inside the extinguisher. When the extinguisher is operated, the liquid changes back to a gas when released.
Burning liquids such as gasoline, kerosene, paint, acetone, and so on.
A foam extinguisher is stored like any other extinguisher that contains liquid that might freeze.
It does not. Technical input: compressed CO2 might be in liquid form INSIDE the fire extinguisher because it is under more than about 5 atmospheres of pressure.
liquid and electrical fires.
Carbon dioxide is a liquid in a fire extinguisher because it is kept under high pressure inside the extinguisher. This high pressure compresses the gas molecules together, causing them to condense into a liquid form at room temperature. When the fire extinguisher is activated, the liquid carbon dioxide is released as a gas, which helps smother the fire by displacing oxygen around it.
A CO2 fire extinguisher will work on flammable liquid and electrical fires only. If used on any other type of fire they will just give it more oxygen and it will spread.