The Smokin' Science of Fire Extinguishers

The video tutorial explains the chemistry of fires and the fire tetrahedron, which consists of oxygen, fuel, heat, and a chemical chain reaction. It discusses different fire classes (A, B, C, D, K) and the appropriate extinguishers for each. Class A fires involve common materials, Class B fires involve flammable liquids or gases, Class C fires involve electrical equipment, Class D fires involve combustible metals, and Class K fires involve cooking oils. The video emphasizes the importance of using the correct extinguisher to prevent spreading the fire or causing harm.

What are the four elements that make up the fire tetrahedron?

• Oxygen, fuel, heat, and chemical chain reaction

• Oxygen, water, heat, and chemical chain reaction

• Oxygen, fuel, water, and chemical chain reaction

• Fuel, water, heat, and chemical chain reaction

Which type of fire extinguisher is suitable for a fire caused by flammable liquids?

• Class C extinguisher

• Class D extinguisher

• Class B extinguisher

• Class A extinguisher

Why is water not recommended for extinguishing electrical fires?

• Water can conduct electricity and cause shocks

• Water can spread the fire

• Water can evaporate quickly

• Water can react with electrical components

What is the primary risk when using a dry chemical extinguisher on a class D fire?

• It can cause an explosion

• It can release toxic gas

• It can extinguish the fire too quickly

• It can spread the fire

What mnemonic can help remember the different fire classes?

• Class A is for ash, class B is for burning, class C is for current, class D is for dense, and class K is for kitchen

• Class A is for ash, class B is for boiling, class C is for cooking, class D is for dense, and class K is for kitchen

• Class A leaves ash, class B boils, class C has a current, class D has dense materials, and class K happens in the kitchen

• Class A is for air, class B is for boiling, class C is for current, class D is for dense, and class K is for kitchen