Aircrew Fundamentals Block 5 Practice Test 2026 - Free Aircrew Fundamentals Practice Questions and Study Guide

A Halon extinguisher is effective on Class B and Class C fires, which involve flammable liquids (like gasoline or oil) and electrical equipment, respectively. Halon works by interrupting the chemical reaction of the fire, making it especially useful for areas where electrical fires might occur.

While Class A fires involve ordinary combustibles like wood and paper, Halon may not be the preferred choice since water or foam extinguishers are more effective for those materials. However, Halon can still suppress Class A fires to some extent, but it is not the most effective method. Therefore, it's important to note that Halon is recognized for its capability to combat Class B and C fires effectively, and its usage can be somewhat acceptable for Class A fires in specific situations.

For this reason, Halon extinguishers are categorized as being usable on all three classes, making the correct answer encompass Class A, B, and C fires.