Final answer:
AFFF extinguishers use foam to suppress fires involving flammable liquids, while stored-pressure extinguishers store both the extinguishing agent and propellant in the same container.
Step-by-step explanation:
AFFF extinguishers, which stands for Aqueous Film Forming Foam, are a type of fire extinguisher that use a foam solution to suppress fires. These extinguishers are typically used for fires involving flammable liquids, such as gasoline or oil. AFFF extinguishers work by smothering the fire with a layer of foam, which helps to cool the fire, prevent oxygen from reaching the fuel, and separate the fuel from the flames.
Stored-pressure extinguishers, on the other hand, are a type of fire extinguisher that store both the extinguishing agent and the propellant in the same container. When the extinguisher is operated, the pressure from the propellant forces the extinguishing agent out of the container and onto the fire. Stored-pressure extinguishers are commonly used for fires involving common combustible materials, such as wood, paper, or cloth.