Tennessee Wastewater Operator Practice Exam

Which type of fire extinguisher is appropriate for electrical fires?

1. Class A

2. Class B

3. Class C

4. Class D

The correct answer is: Class C

The appropriate type of fire extinguisher for electrical fires is the Class C extinguisher. Class C extinguishers are specifically designed to handle fires that involve energized electrical equipment. Since water and certain other extinguishing agents can conduct electricity, using the wrong type of extinguisher on an electrical fire can potentially lead to electrocution or make the fire worse. Class C extinguishers typically contain non-conductive extinguishing agents, such as carbon dioxide or dry chemical agents, which effectively smother the fire without posing a risk of conducting electricity. Understanding the proper classifications of fire extinguishers is critical for safety in environments where electrical equipment is present.