Question 33Safety & Environmental - QMED70% to pass
"Dry Powder" fire extinguishers, which contain a mixture of graphite and sodium chloride as the extinguishing agent, are generally used to fight which type of fire?
AI Explanation
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.
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