Which type of fire extinguisher is intended to be used on 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.

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

Film-forming foam type

AFFF (aqueous film-forming foam) and FFFP (film-forming fluoroprotein) fire extinguishers are rated for use on both Class A and Class B fires. As the name implies, they discharge a foam material rather than a liquid or powder.

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

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

Which factor should be considered when selecting the appropriate type of extinguisher to use on a given fire?

When selecting an extinguisher, some important factors to consider include: Extinguishers intended for certain types of hazards may not be effective against fires of a different hazard class. For example, extinguishers rated BC will not be able to control a Class A fire.

Which method of fire extinguisher forms an oxygen excluding soapy foam over the surface of the burning material?

Wet chemical (potassium acetate, potassium carbonate, or potassium citrate) extinguishes the fire by forming an air-excluding soapy foam blanket over the burning oil through the chemical process of saponification (a base reacting with a fat to form a soap) and by the water content cooling the oil below its ignition …

Which type of fire extinguisher is used for fire on electrical equipment?

In the case of electrical fires, also known as energized electrical fires, a class C fire extinguisher is needed to put it out. If this kind of fire occurs the source of electricity must be identified and shut off because the electricity itself will provide the fire with a constant source of ignition.

Which type of fire extinguisher do you use to fight an electrical fire if carbon dioxide extinguisher is unavailable?

Both carbon dioxide and dry chemicals can be used for electrical fires. An advantage of carbon dioxide is that it leaves no residue after the fire is extinguished. When electrical equipment is not energized, extinguishers for Class A or B fires may be used.

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What is a Type D fire extinguisher?

Class D fires involve combustible metals, such as magnesium, titanium, and sodium. Extinguishers with a D rating are designed to extinguish fires involving combustible metals. Note: Common extinguishing agents may react with a combustible metal fire causing the severity of the fire to increase.

Which extinguishing agent should be used for a Class D fire?

To date, the only type of Class D fire extinguisher is the Dry Powder extinguisher. The powder agent used may be either powdered graphite, granular sodium chloride or copper based, all of which are effective at separating the fuel (the ignited combustible metal) from the oxygen.

Which extinguishing agent should be used for a Class D fire quizlet?

A Class D fire should be extinguished using a: Select one: – carbon dioxide extinguisher. – clean agent extinguisher.

What is fire rating for fire extinguisher?

Fire extinguishers are classified by fire type. The A, B, C rating system defines the kinds of burning materials each fire extinguisher is designed to fight. The number in front of the A, B, or C indicates the rating size of fire the unit can extinguish.

Which type of fire extinguisher would you most likely use of a fire broke out in your workplace?


An ABC extinguisher is effective in putting out Class A, B and C fires and is the type of extinguisher you are most likely to use should a fire break out in your workplace.

What is ABC fire extinguisher?

September 3, 2019. ABC Fire Extinguishers use monoammonium phosphate, a dry chemical with the ability to quickly put out many different types of fires by smothering the flames. 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.

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When using foam a Class B fire is extinguished by?

Foam extinguishes Class B Fires by covering the flammable liquid with a foam blanket, thus cutting off the oxygen supply from the combustion process.

What are the 4 types 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.

  • Class A extinguishers will put out fires in ordinary combustibles such as wood and paper.
  • Class B extinguishers are for use on flammable liquids like grease, gasoline and oil.

How does foam extinguish an oil fire?

The extinguishing effect comes from the heat-resistant foam forming a solid blanket over the flammable materials. … The foam isolates the flames from the oxygen supply and suppresses the development of toxic flue gases. The chemical reaction for combustion is therefore halted and the flame is extinguished.