Associate Safety Professional Practice Exam

What type of material classifies a fire as Class A?

1. Flammable liquids

2. Electrical equipment

3. Ordinary materials such as wood and rags

4. Metals

The correct answer is: Ordinary materials such as wood and rags

Class A fires are defined by the materials involved, which typically include ordinary combustible materials like wood, paper, cloth, and some types of plastics. These materials ignite easily and burn steadily, making them the primary focus for Class A fire extinguishing methods. Understanding the classification is crucial for effective firefighting protocols, as different fire classes require different types of extinguishers. For instance, the appropriate extinguishing agents for Class A fires are usually water or foam, which work to cool the material down and suppress the flames. The other materials mentioned, such as flammable liquids, electrical equipment, and certain metals, fall into different fire classifications. Flammable liquids belong to Class B fires, electrical equipment is classified as Class C, and reactive metals can fall under Class D. Thus, it is essential to recognize the fundamentals of fire classifications to ensure proper safety measures and fire responses are in place.