Basic Firefighter Written Practice Exam

Which class of fire includes materials like wood and paper?

1. Class A

2. Class B

3. Class C

4. Class D

The correct answer is: Class A

Class A fires are defined by their involvement of ordinary combustible materials, which include substances such as wood, paper, cloth, rubber, and some types of plastics. When these materials burn, they produce ash, making them a key identifier of this fire classification. Firefighters are trained to use specific extinguishing agents for Class A fires, typically water or foam, which are effective in cooling and penetrating these common materials to halt combustion. In contrast, other classes of fires deal with different types of combustible materials. Class B fires involve flammable liquids and gases, such as gasoline or propane. Class C fires are related to electrical equipment, and Class D fires involve combustible metals, which require specialized extinguishing methods. This differentiation is crucial for effective fire response and safety, ensuring that firefighters use the right technique and equipment based on the materials involved.