NCIDQ IDFX Practice Exam

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What kind of materials are associated with Type D fire extinguishers?

Flammable liquids
Ordinary combustibles
Combustible metals
Electrical equipment

The correct answer is: Combustible metals

Type D fire extinguishers are specifically designed to combat fires involving combustible metals, such as magnesium, titanium, sodium, and potassium. These materials are unique because they burn at extremely high temperatures and can react violently with water and certain other extinguishing agents. Type D extinguishers typically contain dry powder agents that are effective in smothering the fire and preventing air from reaching the burning material. Understanding the classifications of fire extinguishers is essential for ensuring proper fire safety measures. Each type is tailored to address different classes of fire, so knowing the distinction helps in selecting the right extinguisher for specific situations. In this case, the correct association with Type D fire extinguishers is due to their specialized formulation for handling the unique challenges posed by combustible metals.