What is the most important characteristic of the extinguishing agent in fighting a Class C fire under NFPA?

The extinguishing agent in a Class C fire extinguisher must be electrically nonconductive. 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.

What is the most important characteristics of the extinguishing agent in fighting a Class C fire under NFC?

A Class C fire requires an agent that can break apart the elements that feed a fire: oxygen, heat, and fuel. Carbon dioxide (CO2) extinguishers smother a fire by eliminating the oxygen. They also suppress the fire's heat because their discharge is very cold.

What is the characteristic of a Class C fire?

A class C fire is one in which an energized electrical element is the cause of the fire. “Energized” means that the electrical component (whether electrical appliance, wiring, device, etc.) is connected to a power source.

Which fire extinguisher is suitable for Class C fire?

Fire Extinguisher Classes for Electrical Fires

This is why class C fire extinguishers exist; the substances that can be found in these types of extinguishers are monoammonium phosphate, potassium chloride, or potassium bicarbonate. Another option would be a class C extinguisher that contains carbon dioxide.

What's a Class C fire extinguisher?

Class C. Class C fires involve energized electrical equipment. Extinguishers with a C rating are designed for use with fires involving energized electrical equipment.

Fire Suppression, Control and Extinguishment, abd Extinguishing Agents- Topic 1- CDI 1A

How do you fight a Class C fire?

Ideally, the first step to extinguish a Class C fire is to disconnect the equipment responsible for the fire from the power source. Then, if possible, use a CO or dry powder extinguisher to put the fire out. Refrain from using water or any other chemical that may conduct electricity as it can exacerbate the flames.

How do you handle a Class C fire?

Tackling A Class C Fire

The only extinguisher which is safe to use on a Class C fire is a dry powder extinguisher. It works by cooling the flames until there is no longer enough heat to keep them burning. But using any other type of extinguisher will instead just spread the fuel and flames.

Why is CO2 better than dry chemical for fighting a Class C fire under NFPA?

The extinguishing agent in a Class C fire extinguisher must be electrically nonconductive. 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.

What type of fuel is involved in a Class C fire?

Class C fires are identified by the presence of a burning gas. The most common flammable gases involved in fires are propane, butane and methane, and they form the 'fuel' aspect of the fire triangle, which is required for the fire to start, spread and continue to burn.

Which fire fighting agent is most effective at removing heat?

The preferred method for extinguishing class “A” fires is to remove the heat. Water is the most common agent, but others such as dry chemical, halon, halogenated agents and foam can be used effectively.

Which of the fire extinguishing agents listed is the most effectively used for putting out a paint locker fire?

The preferred extinguishing agent is carbon dioxide. Dry chemical can be used. A Class “D” fire involves combustible metals like magnesium. The best extinguishing agent is a dry powder suitable for the metal involved.

What are the fire extinguisher classes?

Which chemical compound is used as an extinguishing agent in Class K extinguisher?

A Class K fire extinguisher uses a fine wet mist consisting of an alkaline mixture, such as potassium acetate, potassium carbonate, or potassium citrate that forms a soapy foam as it is applied to the cooking oil or other substance, quenching the steam, vapors, and the fire's risk of re-ignition.

Which class of fire extinguisher should be onboard a vessel?

Use a Class C fire extinguisher. Because gasoline fires are the most common type of boat fire, marine-rated Class B fire extinguishers are the class required on most boats.

What type of extinguishing agent should be used on a combustible metal fire?

Thus, it is imperative that only a Class D fire extinguisher is used to extinguisher a combustible metal fire. The best way to extinguish these fires is by smothering them & eliminating the oxygen element. The agent also helps to absorb the heat from the fuel.

Why is carbon dioxide so effective for use in extinguishing Class C fires?

Class C fires, which involve energized electrical equipment, can also be extinguished with CO2. CO2 displaces the oxygen to extinguish the fire. When the CO2 gas is released from the extinguisher it looks like dry ice. This “cloud” of CO2 reduces the oxygen in the air around the fire and smothers it.

How does carbon dioxide help in fire fighting?

Carbon dioxide extinguishes work by displacing oxygen, or taking away the oxygen element of the fire triangle. The carbon dioxide is also very cold as it comes out of the extinguisher, so it cools the fuel as well.

Which extinguishing agents would not be acceptable for use in Class C portable fire extinguishers?

The horns of some older carbon dioxide extinguishers are made of a substance that both negates their class C rating and makes them dangerous for use on class C fires.

Should you use a foam extinguisher on a Class C fire?

The foam extinguisher can only be used on Class A and Class B fires only. If used on Class C fires, it will create a shock hazard. This type of fire extinguisher takes away the oxygen from a fire and removes the heat with a cold discharge.

What is the essential conditions required for extinguishing fire?

Answer: ⭐1)) Three things are required in proper combination before ignition and combustion can take place . ⭐2))We can extinguish fire by cutting of supply of any one of the following (Heat , Oxygen , Fuel) ..... Such fires can be controlled by using a carbon dioxide flame extinguisher or chemical protein foam .

What does ABC fire extinguisher mean?

Dry Chemical Extinguishers come in a variety of types. You may see them labeled: • "DC" short for "dry chem" • "ABC" indicating that they are designed to extinguish class A,B,and C fires, or • "BC" indicating that they are designed to extinguish class B and C fires.

What are the 4 types of fire extinguishers and their uses?

What is Class D fire extinguisher used for?

Use for Class D Fires. What type of fires can be extinguished with a MET-L-X powder extinguisher? Class D fires only involving combustible metals - magnesium, sodium (spills and in depth), potassium, sodium-potassium alloys uranium, and powdered aluminum.

Which extinguishing agent is most effective in fighting a fire or vegetable cooking oil is burning?

Class K fire extinguishers are more effective in extinguishing cooking fires. They use wet chemical agents with a greater firefighting and cooling effect for this type of hazard.