Question 33Safety & Environmental - QMED

The correct answer is C) Class D. Dry powder fire extinguishers containing a mixture of graphite and sodium chloride are generally used to fight Class D fires, which involve combustible metals such as magnesium, sodium, or potassium. These types of fires require a specially formulated extinguishing agent that can smother the fire and prevent reignition. Dry powder extinguishers are effective for Class D fires because the graphite and sodium chloride create a barrier that cuts off the fire's oxygen supply. The other answer choices are incorrect because Class C fires involve energized electrical equipment, and Class B fires involve flammable liquids and gases, which require different types of extinguishing agents that are not suitable for Class D metal fires.