APC is particularly effective against which type of fire?

The correct answer highlights the effectiveness of APC (Aqueous Film-Forming Foam Concentrate) in combating cooking oil and grease fires, which are classified as Class K fires. These types of fires are particularly challenging to extinguish because traditional methods, like water, can exacerbate the situation by spreading the flames due to the flammable nature of cooking oils. APC works by creating a barrier that suppresses flames and reduces heat, making it suitable for these specific types of fires.

In the context of other fire types, while APC can potentially be used on electrical fires to some extent (with caution), it is crucial for those types to utilize extinguishers specifically rated for electrical hazards to avoid electrocution risks. Similarly, for plastic and wood fires, standard Class A extinguishers are generally more effective. Thus, recognizing the specific applications for the various types of fires informs effective firefighting strategies.