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.
What type of fire should you not use a foam extinguisher on?
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.
When should a foam extinguisher not be used?
Class F fires; cooking fires that include oil and grease, for instance, chip pan fires should not be treated with a foam fire extinguisher. Class C fires; fires that involve flammable gases, for instance, butane and methane, are not suitable for treatment with a foam fire extinguisher.
What kind of fires can you use a foam extinguisher on?
Suitable for use on class A solid combustible fires and class B flammable liquid fires, foam fire extinguishers create a cooling blanket effect, smothering burning materials and preventing reignition.
What fire extinguisher should not be used on flammable liquids?
Water extinguishers are used on Class A fires involving solid combustibles. They are not suitable for fires fuelled by flammable liquids or where electricity is involved. Foam is a versatile fire extinguisher which can be used for Class A and B fires. The foam agent helps to prevent re-ignition.
What is foam extinguisher?
05 Jul 2015. 9 LITRES FOAM FIRE EXTINGUISHERS (Chemical Foam) Foam is an effective smothering agent, used for liquid fires mainly. It acts by flowing over the liquid fuel oil surface and isolating the fire from the air, also prevents re-ignition due to the foam stability.
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.
Which two extinguishers should not be used in confined spaces?
When protecting employees and guests in confined spaces, the following fire extinguishers should be avoided:
- Carbon dioxide fire extinguisher. Carbon dioxide fire extinguishers are the worst type of equipment for fighting fires in confined spaces. …
- Dry powder fire extinguishers. …
- Halcon fire extinguishers.
Can foam extinguishers be used on metal fires?
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.
When fighting a fire on deck with foam you should?
Deck – Safety #760 | U.S. Coast Guard Questions and Answers – USCGQ.com. Which statement about firefighting foam is TRUE? A) To be most effective, foam should be directed at the base of the fire.
When use foam a Class B fire extinguished?
Foam extinguishes Class A Fires by cooling the burning material and removing the heat from the combustion triangle. Foam extinguishes Class B Fires by covering the flammable liquid with a foam blanket, thus cutting off the oxygen supply from the combustion process.
Which fire extinguisher would you keep in your kitchen?
The answer is you can use either a dry powder fire extinguisher which has a blue coloured label,or a CO2 fire extinguisher which has a black label. Both fire extinguisher types are suitable to use on electrics which many people have in a kitchen so both are a good example to use if your toaster was to catch fire!
Which extinguisher should not be used on materials?
Dangers: CO2 extinguishers should not be used on fires involving solid materials, such as paper, wood and fabric, and also are not suitable for use on flammable gases.