Michigan Residential Builders License Practice Test

What type of fire is classified as a class A fire?

1. A chemical fire

2. A fire fueled by metals

3. A fire fueled by wood and paper

4. A fire involving electrical equipment

The correct answer is: A fire fueled by wood and paper

Class A fires are those that involve ordinary combustibles, which include materials such as wood, paper, cloth, rubber, and some plastics. These materials are common in residential and commercial settings, making Class A fires the most prevalent type encountered in various environments. The classification is part of a broader system used to categorize fires based on their fuel sources, ensuring that the appropriate extinguishing methods can be employed effectively. In the case of Class A fires, water is typically the most effective extinguishing agent, as it helps cool the burning material below its ignition temperature and removes the heat necessary for combustion to continue. Understanding this classification is crucial for anyone involved in construction or building maintenance, as it helps inform fire prevention strategies and response protocols.