WebThe general category of fire extinguishing agents that effectively leaves no residue is a: Select one: a. dry-chemical system. b. carbon dioxide (CO2) system. c. foam system. d. clean agent system. D Which dry-chemical system component releases agent into the piping system? Select one: a. Actuating mechanism b. Nozzles c. Storage container d. WebApr 25, 2024 · No, the foam from the fire extinguisher contains aqueous film forming foam (AFFF) and is considered non-poisonous and non-toxic to humans or the environment. Additionally, the foam solution is non-damaging to most materials, the exception being electrical appliances or equipment.
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WebThe chemical that a fire extinguisher contains depends on the purpose for which it is used. The most common chemical is Sodium Bicarbonate used in the fire extinguisher, and by … WebMar 26, 2024 · The foam smothers the fire in solids and liquids (Class A and B), but not in burning fats or cooking oils (Class F), so foam fire extinguishers are used on burning … npower multi purchase
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WebJul 16, 2024 · The extinguishing agent can be comprised of, but is not limited to, solutions of water and potassium acetate, potassium carbonate, potassium citrate, or a combination of these chemicals (which are conductors of electricity). The liquid … In the hands of trained personnel, portable fire extinguishers are the first line of d… WebJun 27, 2024 · Foam fire extinguishers work in 2 ways. They are mainly water-based and so have the same cooling effect as water extinguishers, putting the fire out by lowering the temperature. They contain ‘Aqueous Film Forming Foam’ (this is why they are also known as AFFF foam extinguishers). WebOct 1, 2004 · Foam extinguishers use an aqueous film-forming foam (AFFF) agent that expels a layer of foam when it is discharged through a nozzle. It acts as a barrier to exclude oxygen from a fire. Extinguishers for Class C fires The extinguishing agent in a Class C fire extinguisher must be electrically nonconductive. night and day recovery house surrey bc