The portable Halon fire extinguisher can be used on all classes of fires.

• A. True
• B. False
• C. Only Class A fires
• D. Only Class B fires

Answer: (A)

The key idea is that in aviation, the portable Halon extinguisher is designed to handle the three fire types you’re most likely to encounter onboard: ordinary combustibles (A), flammable liquids (B), and electrical equipment (C). Halon acts by interrupting the chemical reactions occurring in the flame and by cooling and smothering the fire, making it effective across those A, B, and C categories. On an aircraft you don’t typically deal with Class D metal fires or Class K cooking fires, so within the flight environment Halon covers the main onboard fire scenarios. That’s why saying it can be used on all relevant onboard fire classes is the best answer.