92F Military Occupational Specialty (MOS) Training Test 1 Practice

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.