Ontario MTO Truck Knowledge Practice Test

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Prepare for the Ontario MTO Truck Knowledge Test with our engaging quiz, featuring multiple choice questions, hints, and explanations for each answer. Get ready to ace your exam and ensure a successful driving career!

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Which type of fires are Class D fire extinguishers best suited for?

Burning wood
Burning paper
Burning metals
Electrical fires

The correct answer is: Burning metals

Class D fire extinguishers are specifically designed to combat fires caused by burning metals, such as magnesium, lithium, or titanium. This type of fire extinguisher contains a dry powder that smothers the fire and prevents it from spreading. Option A and B, burning wood and paper, would be best handled by Class A or B fire extinguishers, respectively. These types of extinguishers are better equipped to fight fires caused by common combustible materials, such as paper, wood, or cloth. Option D, electrical fires, would be best handled by a Class C fire extinguisher, as it contains materials that are non-conductive and can safely extinguish fires involving electrical equipment. In summary, Class D fire extinguishers are best suited for combating fires caused by burning metals, and should not be used for fires involving other materials.