What are the two film forming agents found in fire extinguishers?

The two film-forming agents found in fire extinguishers are AFFF (Aqueous Film-Forming Foam) and FFFP (Film-Forming Fluoroprotein Foam). These agents create a barrier between the fuel and the oxygen in the environment, effectively suppressing the fire. AFFF is specifically designed to produce a film that spreads over the surface of flammable liquids, preventing re-ignition. FFFP also provides a similar function but incorporates proteins to enhance its effectiveness against certain types of fires.

The other options do not represent film-forming agents. Foam and water are not both film-forming; while water can suppress fires, it does not create a film like AFFF and FFFP. CO2 and dry chemical options are used to extinguish fires as well, but they do not form a protective film. Halons and powders may be effective for extinguishing specific fire types but, similarly, do not include film-forming properties. Thus, the identification of AFFF and FFFP as film-forming agents is crucial for understanding their role in effective fire suppression.