Texas Security Level II Certification Practice Test

Which type of fire extinguisher should be used to put out an electrical fire?

1. A

2. B

3. C

4. D

The correct answer is: C

The selection of a type C fire extinguisher for electrical fires is based on its specific design and chemical composition, which are suitable for extinguishing flames caused by energized electrical equipment. A type C extinguisher contains non-conductive substances, typically a dry chemical such as monoammonium phosphate or sodium bicarbonate, that can effectively interrupt the chemical reaction that fuels the fire without posing a risk of electric shock to the user. Using the correct extinguisher is crucial when addressing electrical fires, as other types, such as those for ordinary combustibles or flammable liquids, may not effectively extinguish an electrical fire and could even exacerbate the situation. For instance, type A extinguishers are meant for materials like wood or paper and have a water-based extinguishing agent, which can conduct electricity. Therefore, choosing a type C extinguisher helps ensure safety and efficacy in putting out electrical fires.