Final answer:
Fffp foam stands for Film-Forming Fluoroprotein Foam and is used to extinguish flammable liquid fires by creating a protective film over the surface.
Step-by-step explanation:
Fffp foam, which stands for Film-Forming Fluoroprotein Foam, is a type of fire-extinguishing agent used on A and B classes of fires. This foam is ideal for fires involving flammable liquids and can cling to surfaces, providing a protective film that helps to prevent the fire from reigniting. The foam is made by combining a protein-based foam concentrate with fluorochemical surfactants, which work together to create a thin, continuous film on the surface of the flammable liquid.