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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.
What are the 6 classes of fire?
Fires are classified in six groups A, B, C, D, F and electrical: Class A fires – are fires involving organic solids like paper, wood, etc. Class B fires – are fires involving flammable liquids. Class C fires – are fires involving flammable gasses. Class D fires – are fires involving burning metals (eg aluminium swarf).
What are the 5 classes of fire extinguishers?
5 Types of Fire Extinguishers Class A Fire Extinguishers. Class A fire extinguishers are safe for use on ordinary combustible fires, like those fueled by paper or wood. Class B Fire Extinguishers. Class C Fire Extinguishers. Class D Fire Extinguishers. Class K Fire Extinguishers.
What are the main classes of fire?
Classes of fire Class A. A class A fire is burning flammable solids as fuel. Class B. Class B fires are burning flammable liquids. Class C. Class C fires burn flammable gases. Class D. Class D fires are burning flammable metals. Electrical. Any fire involving electrical equipment is classed as an electrical fire. Class F.
What are Class ABCD fires?
An extinguisher with an ABC rating is suitable for use with fires involving ordinary combustibles, flammable liquids and energized electrical equipment. An extinguisher that is rated for use with multiple hazards should include a symbol for each hazard type.
What are the classes of fire and its description?
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.
How many classes of fire are there?
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 5 different classes of fire PDF?
There are 4 classes of fire: Class A. Ordinary combustibles or fibrous material, such as wood, paper, cloth, rubber, and some plastics. Class B. Flammable or combustible liquids such as gasoline, kerosene, paint, paint thinners and propane. Class C. Class D.
What is the most common type of fire?
1. Kitchen fires. The most common type of fire in the U.S. is the kitchen fire. The reason that the kitchen is the source of many fire hazards is because the kitchen is where heat, electricity, water, and grease come together.
What are the 6 classes of fire extinguishers?
6 TYPES OF EXTINGUISHERS ABC Powder Fire Extinguisher. Carbon Dioxide Fire Extinguisher. Wet Chemical Fire Extinguisher. Water Mist Fire Extinguisher. Foam Fire Extinguisher. Clean Agent Fire Extinguisher.
What are the 4 classes of fire extinguishers?
There are four classes of fire extinguishers – A, B, C and D – and each class can put out a different type of fire. Multipurpose extinguishers can be used on different types of fires and will be labeled with more than one class, like A-B, B-C or A-B-C.
What are the examples of class A of fire?
Class A fires are defined as ordinary combustibles. These types are fires use commonly flammable material as their fuel source. Wood, fabric, paper, trash, and plastics are common sources of Class A fires.
What are the 4 types of fire extinguishers PDF?
What Are the Different Types of Fire Extinguishers? Water. Powder. Foam. Carbon Dioxide (CO 2 ). Wet chemical.
What are 4 ways fire spreads?
There are 6 ways in which a fire will commonly spread: Direct Contact. Initially, this is how fires normally spread until the heat builds up. Radiation. As a fire increases in intensity, it will give off more heat. Conduction. Convection. Flashover. Backdraught.
What are the 7 sides of a fire?
Command must consider the seven sides (or sectors) of the fire: front, rear, both sides, top, bottom, and interior. Fires cannot be considered under control until all seven sides are addressed. Failure to address all seven sides will frequently result in fire extension.
What extinguisher is Class C?
“C” ELECTRICAL EQUIPMENT Fire extinguishers with a Class C rating are suitable for fires in “live” electrical equipment. Both monoammonium phosphate and sodium bicarbonate are commonly used to fight this type of fire because of their nonconductive properties.
What is K class fire extinguisher?
Class K fire extinguishers are more effective in extinguishing cooking fires. NFPA revised this standard in 1998, specifying that “Fire extinguishers provided for the protection of cooking appliances that use combustible cooking media (vegetable or animal oils and fats) shall be listed and labeled for Class K fires.”.
What is a Type B 1 fire extinguisher?
B-1 Extinguishers are USCG approved and meet the need for a Type B, Size 1 USCG approved Fire Extinguisher. Amerex B-I Fire Extinguishers must be: Dry Chemical, ABC, or Purple K: 2 lbs or larger. Carbon Dioxide (Co2): 5 lbs or larger. Halon: 2.5 lbs or larger.
What is fire types of fire?
Choose the Right Fire Extinguisher Fire Class Fuel Type How to Suppress Class A Freely burning combustibles Water, Smothering Class B Burning liquid or gas Smothering Class C Electrical fire Non-conductive chemicals Class D Metallic fire Dry powder agent.
What are stages of fire?
By most standards including the International Fire Service Training Association (IFSTA) there are 4 stages of a fire. These stages are incipient, growth, fully developed, and decay.
What are the 3 types of fire extinguishers?
According to OSHA, air pressurized water, carbon dioxide (CO2) and dry chemical are the three most common types of fire extinguishers, with wet chemical extinguishers also used often. For general use, Mike Duffield, EMC Risk Improvement Manager, sees multi-purpose fire extinguishers used most often.
What are the 4 components of fire?
Oxygen, heat, and fuel are frequently referred to as the “fire triangle.” Add in the fourth element, the chemical reaction, and you actually have a fire “tetrahedron.” The important thing to remember is: take any of these four things away, and you will not have a fire or the fire will be extinguished.
What is class F fire?
Class F fires that are caused by the ignition of cooking oils and fats. These fires occur when said oils or fats reach their flash point – in this case, flash point is around 315 °c. These fires can be extremely dangerous and can spread very quickly.
