What determines the class of fire?

Fire is divided into five classes (A, B, C, D, and K) that are primarily based on the fuel that is burning. This classification system helps to assess hazards and determine the most effective type of extinguishing agent.

Why is it important to know the different classes of fire?

Understanding the Different Types and Uses of Fire Extinguishers. There are different types of fire extinguishers because there are various types of fires. Each extinguisher is suitable for fighting certain types, and it’s important for you to know the differences if its your job to fight fires at work.

How can we prevent class fires?

The simplest, and most obvious, way to prevent Class A fires occurring is to identify and manage any organic materials in your environment which may burn, removing them from any possible sources of ignition.

What are the 4 classes of fire?

Classes of fire

• Class 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. (

What is Type D fire?

What is 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 are the 6 classes of fire?

There are 6 different classes of fire, and each should be attacked in a different way.

• Class A (Solids) Class A fires are fires involving solids.
• Class B (Liquids) Class B fires are fires involving liquids.
• Class C (Gases)
• Class D (Metals)
• Electrical Fires.
• Class F (Cooking Fats & Oils)

What are Class A and B fires?

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 is a Class K fire?

The NFPA describes class K fires as those fires that involve combustible cooking materials such as vegetable oils that are used in cooking operations.

What is the best defense against fire?

As always, the best defense against a fire is to be prepared. Take a moment to look at your fire extinguisher.

What are the 3 methods of extinguishing a fire?

All fires can be extinguished by cooling, smothering, starving or by interrupting the combustion process to extinguish the fire. One of the most common methods of extinguishing a fire is by cooling with water.

What is a Type D fire?

Class D fires only involving combustible metals – magnesium, sodium (spills and in depth), potassium, sodium-potassium alloys uranium, and powdered aluminum.

What are the four classes of a fire?

Classes of Fires. 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.

How is a Class C fire different from a Class A fire?

“Class C” is a term that distinguishes a fire from Class A and Class B fires. Class A is a category for fires consuming a source like fire or wood that can be extinguished with water, and Class B fires are fueled by flammable liquids like gasoline.

Which is an example of a Class B fire?

Trash fires are one such example. Class A fires are commonly put out with water or monoammonium phosphate. The Class B fire is defined as one that uses a flammable liquid or gas as its fuel base.

Which is the most dangerous class of fire?

Class B Fires: Flammable Liquids and/or Gases The next fire type you need to be aware of is the ones started by flammable liquids. These include alcohols, oil, gasoline, and paint. These fires are dangerous as they can happen anywhere these liquids are used or stored.