What is the standard tactic for fighting an engine fire on the ground in ARFF operations?

What is the standard tactic for fighting an engine fire on the ground in ARFF operations?

• A. Direct/indirect attack with water/foam to cool engine and fuel sources.
• B. Ventilation-only approach.
• C. Dry chemical powder only.
• D. Ignore engine fire and wait.

Answer: (A)

Cooling the engine and controlling the fuel source with a water or water/foam application is the standard tactic for a grounded engine fire. The goal is to rapidly reduce heat in the engine compartment and suppress any escaping fuel so the fire cannot reignite. A direct attack targets the base of the flames to deliver cooling where it’s most intense and to contact exposed fuel sources, while an indirect attack uses a fog pattern to blanket the area from a safer distance, still delivering cooling and extinguishing effect without exposing responders to the hottest heat. Foam is especially helpful with hydrocarbon fuels because it blankets the fuel, helping to separate it from air and extending suppression. This approach is preferred over a ventilation-only method, a powder-only method, or simply waiting, since those options do not actively cool or extinguish the fire and can allow it to spread or reignite.

Cooling the engine and controlling the fuel source with a water or water/foam application is the standard tactic for a grounded engine fire. The goal is to rapidly reduce heat in the engine compartment and suppress any escaping fuel so the fire cannot reignite. A direct attack targets the base of the flames to deliver cooling where it’s most intense and to contact exposed fuel sources, while an indirect attack uses a fog pattern to blanket the area from a safer distance, still delivering cooling and extinguishing effect without exposing responders to the hottest heat. Foam is especially helpful with hydrocarbon fuels because it blankets the fuel, helping to separate it from air and extending suppression. This approach is preferred over a ventilation-only method, a powder-only method, or simply waiting, since those options do not actively cool or extinguish the fire and can allow it to spread or reignite.