When using foam a Class B fire is extinguished by?

CO2: A carbon dioxide fire extinguisher works on a Class B fire by expelling CO2 to suffocate the fire, removing the oxygen necessary to keep it burning.

How are fires extinguished when using a foam fire extinguisher?

Foam extinguishers build up of foam on the surface of the burning liquid, cutting off the oxygen supply to the fire and cooling the hot liquid. Electrical fires: If your foam extinguisher is tested to 35000 Volt (35kV) you can use the extinguishers on live electrical fires.

What is foam and how it extinguish fire?

Foam agents work well on combustible materials like wood, paper, and cloth as well as flammable oils, diesel fuel, and alcohols to name a few. They are non-toxic and extinguish the fire by forming a blanket on the surface of the burning hazard, which both cools and smothers the fire by removing the oxygen.

Can you use a foam extinguisher on a on a Class A fire?

Foam Extinguisher

Foam extinguishers are effective to combat Class B fires. They can also be used for Class A fires which include wood, plastic, textiles, and paper.

What is foam type extinguisher?

What is a foam fire extinguisher used for. AFFF (Aqueous Film Forming Foams) Foam Fire Extinguishers are suitable to fight burning solids such as wood as well as liquid fires such as burning petrol. The foam has the ability to creep over the burning liquid or to soak into burning materials such as settees.

The effects and advantages of CAFS One Seven on a Class B Fire (EN)

What elements does a foam extinguisher remove?

They are heat, fuel and oxygen. All fire extinguishers work by removing one or more of these 3 key elements. Foam fire extinguishers smother a fire using a thick foam solution therefore removing the element of oxygen and extinguishing the fire.

What is Class B firefighting foam?

Class B firefighting foams are commercial surfactant solutions that have been (and continue to be) stored and used for fire suppression, fire training, and flammable vapor suppression at military installations and civilian facilities and airports, well as at petroleum refineries and bulk storage facilities, and ...

Which one is a Class B fire?

Class B: Flammable liquids such as alcohol, ether, oil, gasoline and grease, which are best extinguished by smothering.

How do you extinguish a Class B fire?

To extinguish a Class B fire, you want to cut off the oxygen. You can use carbon dioxide gas to dilute the oxygen available and stop the burning. Smothering the fire with bicarbonate (baking soda) or potassium carbonate will also work.

Which type of extinguishing agent is used to extinguish a Class B fire?

CO2: A carbon dioxide fire extinguisher works on a Class B fire by expelling CO2 to suffocate the fire, removing the oxygen necessary to keep it burning. It also helps with removing the heat, as the discharge is very cold.

Which is a commonly used method of extinguishing Class B fires quizlet?

Halon 1301 and Halon 1211 are most commonly used as extinguishing agents for Class B and Class C fires.

What is an appropriate use for class B foam?

There are many different types of foam for firefighting: Class A foam is used for combustibles, structural fires and wildfires; Class B foam is used for ignitable liquids, like gasoline and diesel; and polar solvent foams help extinguish alcohol-based liquids and alcohol-type fuels.

Can you use Class A foam on a Class B fire?

It's obvious that Class A foam is used to fight Class A fires, and that Class B foam snuffs out the Bs.

When should I use foam firefighting?

Class 'B' foam is used for Class 'B' fires, which are fires that involve flammable liquids such as alcohol, ether, oil, gasoline or grease. Class 'B' fires are best extinguished by smothering or applying a blanket of Class 'B' foam, which is meant to float on the surface of burning fluid.

What Colour is a foam type extinguisher?

Label Colour: Cream – Foam Extinguishers

Foam extinguishers with their cream labels are the most common type of fire extinguisher for Class B fires. They also work on Class A fires, being water-based.

What fire extinguisher can be used on class A fire?

Water fire extinguishers are the most popular fire extinguisher type and they are suited to class A fire risks. They distribute water at a high pressure to extinguish flames.

Which is an appropriate use for class B foam quizlet?

B. Class A foam is used to prevent ignition of fires involving flammable and combustible liquids. C. Class A foam reduces the surface tension of water, allowing better water penetration into the fuel.

Is AFFF Class B foam?

Class B Foam (also called AFFF): Used to extinguish Class B materials, which include gasoline, oil, and jet fuel.

How do you apply foam to a fire?

The foam is applied first onto a vertical surface (wall, tank…). The foam then spreads carefully above the burning liquid surface. The foam blanket formed will avoid fuel agitation and foam contamination by the fuel. Fire departments mostly use gentle application during their operations.

Which of the following foams is well suited for flooding confined spaces to extinguish a fire or prevent ignition?

High expansion foam is a relatively new agent for control and %xtinguishment of Class A and Class B fires and is particularly suited as a flooding agent for use in confined spaces.

What is foam used for?

One of the most common uses of foam is in the creation of mattresses and mattress toppers. Since foam can be made to achieve nearly any desired firmness by adding certain chemical characteristics during manufacturing, it's often used to make mattresses and toppers to meet the diverse needs of consumers.

What are the types of foam used in firefighting?

Common types of persistent firefighting foams are AFFF, FP, FFFP, and their alcohol resistant varieties.

What type of foam is used to extinguish fires involving flammable and combustible liquids?

Class B. Class B fires involve flammable and combustible liquids such as gasoline, alcohol, oil-based paints, lacquers. Therefore, extinguishers with a B rating are designed to extinguish fires involving flammable and combustible liquids.

What portable firefighting extinguisher is intended for use on a Class B fire?

Aqueous Film Forming Foam (AFFF) Extinguishers. ~Are intended for Class B fires. ~ They are particularity useful in combating fires in or suppressing vapors from a small liquid fuel spills.