AWS Welding Inspection and Testing Certification Practice Test

Which type of fire extinguisher is appropriate for electrical fires?

1. Type A

2. Type B

3. Type C

4. Type D

The correct answer is: Type C

The appropriate fire extinguisher for electrical fires is indeed the one categorized as Type C. This type of extinguisher is specifically designed to combat fires that involve energized electrical equipment. Using a water-based extinguisher on such fires can be extremely dangerous, as water is a conductor of electricity and can lead to electrocution. Type C extinguishers typically use non-conductive agents like carbon dioxide (CO2) or dry chemical powders, which effectively extinguish the flames while ensuring the safety of the user. They are marked with a blue circle, indicating their suitability for electrical fires. In contrast, Type A extinguishers are for ordinary combustibles like wood and paper, while Type B extinguishers deal with flammable liquids. Type D extinguishers are specifically aimed at fires involving combustible metals, which are not relevant regarding electrical fires. Each type serves a specific purpose, making it crucial to select the correct one to ensure safety and effective extinguishment of the fire.