How many classes of fire are there?

How many classes of fire are there?

• A. Two
• B. Three
• C. Five
• D. Four

Answer: (D)

Fire classifications help us choose the right method and extinguisher for different hazards. In this training, there are four primary classes: ordinary combustibles (like wood and paper), flammable liquids, electrical fires, and certain reactive metals. That four-category framework is why the correct answer is four. Some curricula add a fifth class for cooking oils (K), but in this context the standard count used is four.

Fire classifications help us choose the right method and extinguisher for different hazards. In this training, there are four primary classes: ordinary combustibles (like wood and paper), flammable liquids, electrical fires, and certain reactive metals. That four-category framework is why the correct answer is four. Some curricula add a fifth class for cooking oils (K), but in this context the standard count used is four.