G2 Gas Fitter Practice Exam

Which type of fire extinguisher is appropriate for a water-based fire?

1. B

2. C

3. A

4. D

The correct answer is: A

The most appropriate type of fire extinguisher for a water-based fire is the Class A extinguisher. Class A extinguishers are specifically designed to combat fires involving ordinary combustible materials such as wood, paper, cloth, and some types of plastics—essentially materials that burn in a typical fire. These extinguishers generally contain water or foam, which is effective in cooling down the materials and reducing the fire's heat. When water is applied to these classes of fires, it helps to extinguish the flames effectively and safely, making Class A extinguishers the best choice for tackling such incidents. Other classes of extinguishers, while important, are suited for different types of fires: Class B is used for flammable liquids, Class C for electrical fires, and Class D is meant for combustible metals. Thus, it is crucial to select an extinguisher that matches the type of fire being addressed to ensure effective suppression and safety.