Which of the following materials falls under Class A fuels?

Class A fuels are typically defined as ordinary combustible materials that are solid in nature. Wood and wood-based products are prime examples of such materials, as they ignite easily and can sustain combustion. This category includes items like paper, cloth, and certain plastics as well.

The other options represent different classes of materials. Compressed natural gas does not fall under Class A because it is a gas and is classified as a flammable gas. Fuels consisting of metals are grouped as Class D fires and require specific extinguishing agents due to the distinct nature of metal combustion. Energized electrical wires are associated with Class C fires, which involve electrical equipment and require methods to safely extinguish fires without risking electrocution.

Understanding the classification of different materials is vital for effective fire prevention and suppression strategies, ensuring safety for both responders and victims.