Quick Answer: How Are Fire Classified?

How are fires organized?

Fires are grouped into classes which depend on the material or substance that is present.

Class A – Fires involving ordinary combustibles such as paper, wood, cloth, rubber, or plastics.

Class K – Fires involving combustible cooking oils, or fats in cooking appliances..

What are Class ABC fires?

This pale, yellow powder can put out all three classes of fire: … Class A is for trash, wood, and paper. Class B is for liquids and gases. Class C is for energized electrical sources.

What are the 5 types of fire extinguishers?

When it comes to the types of fire extinguishers, there are five main types including wet chemical, CO2, dry powder, foam and water.

What is an example of a Class D fire?

A Class D fire is characterised by the presence of burning metals. Only certain metals are flammable and examples of combustible metals include sodium, potassium, uranium, lithium, plutonium and calcium, with the most common Class D fires involve magnesium and titanium.

What is a Type K fire?

What Are Class K Fires? A Class K fire is fueled by flammable cooking liquids, such as cooking oil, and animal or vegetable-based greases. These liquids, when brought up to high temperatures, become volatile and can easily ignite. Due to their high flammability, they also spread rapidly.

What is tetrahedron of fire?

A tetrahedron can be described as a pyramid which is a solid having four plane faces. Essentially all four elements must be present for fire to occur, fuel, heat, oxygen, and a chemical chain reaction. … Each of the four sides of the fire tetrahedron symbolise the Fuel, Heat, Oxygen and Chemical Chain Reaction.

What is a Class C fire?

A class C fire is one in which an energized electrical element is the cause of the fire. … But it is always best to disconnect the power source prior to fighting the fire. A Class C fire extinguisher is used to extinguish a fire that is caused by an energized electrical element.

What is classification of fire?

There are four classes of fires: Class A: Ordinary solid combustibles such as paper, wood, cloth and some plastics. Class B: Flammable liquids such as alcohol, ether, oil, gasoline and grease, which are best extinguished by smothering.

What are the 4 types of fire?

Classes of fireClass A – fires involving solid materials such as wood, paper or textiles.Class B – fires involving flammable liquids such as petrol, diesel or oils.Class C – fires involving gases.Class D – fires involving metals.Class E – fires involving live electrical apparatus. (More items…

What’s the worst type of fire?

Class C. Fires involving flammable gases are one of the most dangerous types of fire to fight. Gases such as butane, propane and petroleum gases have the potential to create an explosion, if triggered by a single spark and for this reason have to be stored securely in sealed containers.

What are the different sizes of fire extinguishers?

The size of a fire extinguisher indicates the amount of extinguishing agent it holds and is most often measured in pounds. Sizes can range from as small as 2.5 lb. to as large as 350 lb….Common fire extinguisher sizes and their approximate weight2-A:10B:C – 4 lb.3-A:40B:C – 5 lb.4-A:60B:C – 10 lb.10-A:80B:C – 20 lb.

What is the best defense against fire?

Prevention – Remember preventionPrevention – Remember prevention is your best defense against fire….Maintenance – Good maintenance is a very important step in preventing chimney fires!Have your chimney checked every year by a qualified chimney professional.Burn only well seasoned hardwoods.Install a chimney cap.Install a carbon monoxide detector.More items…