Which type of fire extinguisher is recommended for extinguishing pole fires?

The correct answer, the dry-chemical fire extinguisher, is the most effective choice for extinguishing pole fires due to its versatility and efficiency in combating various types of fires. Pole fires often involve electrical fires or combustibles that can ignite in outdoor environments. Dry-chemical extinguishers contain agents such as monoammonium phosphate, which can effectively interrupt the chemical reaction of a fire and can also smother flames, preventing oxygen from fueling the fire.

These extinguishers are particularly useful for Class A fires (ordinary combustibles), Class B fires (flammable liquids), and Class C fires (energized electrical equipment), making them suitable for scenarios where a pole might catch fire due to both combustible materials and electrical components.

Water fire extinguishers are not suitable for electrical fires, and while foam extinguishers are effective against flammable liquids, they might not be as versatile for the different materials involved in pole fires. CO2 extinguishers are effective against electrical and Class B fires but do not provide the same level of effectiveness against ordinary combustibles. Therefore, the dry-chemical fire extinguisher stands out as the recommended choice for extinguishing pole fires effectively.