FPAI

contains sodium bicarbonate and a foam stabilizing agent in a larger compartment and a solution of aluminum sulfate in an inner cylinder; reaction between the two solutions form a stabilized foam of carbon dioxide bubbles. (FOR CLASS A and B)

oldest type; sodium bicarbonate with water; a small bottle of sulfuric acid is suspended inside (near the top) in such a way that when the extinguisher is turned up-side-down, the acid mixes with sodium bicarbonate; carbon dioxide is formed by the reaction which results to the building of pressure inside the extinguisher which forces the water solution out from the container through a hose.

non-conducting liquid, generalized carbon tetrachloride or chlorobromethane; operation is by manual pumping or using a stored pressure; the stream of liquid that is expelled is vaporized by the heat of the fire and forms a smothering blanket. Usually used in fires involving flammable liquids or live electrical equipment

Effective against burning liquids and fires in live electrical equipment; used mainly to put out Class C fires. (Class B and C Fires)Extinguishment with CO2 is primarily for smothering.

abnormal movement of fire due to interference of foreign matter. Thermal imbalance often confuses the fire investigator in determining the exact point where the fire originated.

rising movement or pattern of the fire; the normal behavior when the fire is undisturbed.

highly flammable chemicals that are used to facilitate flame propagation

the preparation and/or gathering of combustible materials needed to start a fire.

the preparation of flammable substances in order to spread the fire

Negligence and other Forms of Human Error