During a vehicle collision, a bystander is trying to smother a small engine fire with a jacket. What is the best approach for extinguishing the fire?

Aiming at the base of the fire and using short bursts is the most effective approach for extinguishing a small engine fire for several reasons. First, targeting the base of the fire directly addresses the fuel source, which is essential for effectively suppressing combustion. By applying the extinguishing agent at the base, it can interrupt the chemical reaction of the fire, rather than just cooling the flames that are visible above.

Using short bursts is also advantageous, as it prevents flooding the area with too much extinguishing agent too quickly, which could lead to a potential re-ignition if the fire isn't fully suppressed. This method provides better control and allows the person to adjust their strategy based on the fire's response.

While forming a cloud of extinguishing agent over the fire can help in certain situations, it may not be as effective as directly targeting the flames at their source. Spraying a continuous stream from a distance might not have the desired effect and could lead to the fire spreading. Additionally, throwing a blanket over the fire to smother it may not fully deprive the fire of oxygen or could be too risky if the individual is too close to a volatile engine fire.