A foam fire extinguisher is mostly water. therefore should not be used on Class E fires. The aqueous solution is corrosive and requires to be cleaned after used, particularly on painted surfaces. It is advised to not use foam extinguishers for class F fires.
What is the disadvantage of foam extinguisher?
Disadvantages: The liquid in the extinguisher will damage electrical equipment such as computers (although these may of course have already been damaged by the fire itself)
What are incorrect consequences of foam extinguisher?
The dangers of using the incorrect fire extinguisher:
Applying water to a metal fire could cause hydrogen to be given off resulting in an explosion. Special dry powder fire extinguishers are available for use on metal fires.
When should you not use a foam fire extinguisher?
Foam extinguishers are also safe for use on flammable liquid fires. They CANNOT be used on electrical fires or flammable metal fires as this extinguisher could end up exacerbating the fire.
What are the disadvantages of fire extinguishers?
– Only once can be used. – Not suitable for combustion of electrical and metallic tools. – Cannot be placed where the temperature is cold and can freeze. – Cannot control and remove large fires.
How are fires extinguished when using a foam fire extinguisher?
The foam extinguishes liquid fires by sealing the surface of the liquid, preventing flammable vapour reaching the air and starving the fire of fuel. They are not suitable for use on free flowing liquid fires. Foam extinguishers have a cream label.
How does foam extinguisher put out a fire?
Foam Fire Extinguishers provide a fast, powerful means of tackling flammable liquids. They do so by creating a blanket of foam that smothers the fire, cutting of its supply of oxygen of oxygen and contains the flame preventing re-ignition.
What happen if you use wrong extinguisher?
Just by using the wrong class of fire extinguisher, you can make things worse. Massive flashes and huge flames might occur, and you may result burned or electrocuted. Given the scenario, it is possible for the electricity to run through the conductive water or foam, and kill you.
Why would you not use a foam extinguisher on an electrical fire?
This type of fire extinguisher should not be used for fires caused by flammable metals, kitchen fires and fires that involve electrical equipment. These extinguishers work by creating a cooling effect on the fuel that is responsible for causing the fire.
Can a fire extinguisher make a fire worse?
An extinguisher is labeled according to whether the fire occurs in wood, cloth, flammable liquids, and electrical or metal sources. Using one type of extinguisher on another type of fire can make the fire much worse.
Can foam extinguisher used electrical fires?
Please note that foam extinguishers should only be used on or near live electrical equipment if they are di-electrically tested. Only tackle small fires with an extinguisher. … Electrical fires: If your foam extinguisher is tested to 35000 Volt (35kV) you can use the extinguishers on live electrical fires.
Are foam fire extinguishers toxic?
Safely Cleaning Up Foam and Liquid Residues
As the foam or liquid from these types of fire extinguishers is known to be carcinogenic, it’s best to put on goggles and impermeable protective gloves before starting.
When using a foam extinguisher where should you aim to be most effective?
Aim the hose at the base of the fire with one hand. Don’t aim for the flames, but instead for the base moving the jet across the area of the fire to cover the flammable liquid.
What are the disadvantages of fire?
Disadvantages: Fire can cause soil damage, especially through combustion in the litter layer and organic material in the soil. This organic material helps to protect the soil from erosion. When organic material is removed by an essentially intense fire, erosion can occur.