A car fire extinguisher is usually a compact version of the same ABE Dry Chemical Powder fire extinguisher that you can find in many offices and stores. This is because the powder is a multi-purpose extinguishing agent that can put out three classes of fire: Class A, B, and E fires. Understanding Fire Classes: Class A involves burning materials such as wood, paper, or cloth. Class B includes fires that originate from flammable liquids such as petrol, diesel, and oils. Class E pertains to fires involving electrical equipment.