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.
A foam extinguisher is stored like any other extinguisher that contains liquid that might freeze.
Burning liquids such as gasoline, kerosene, paint, acetone, and so on.
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.
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.
A fire extinguisher tech makes around $32.52 an hour. All fire extinguishers are designed to put out fires. A Dry extinguisher uses a powder or gas rather than a liquid and someone gets paid to make these.