Ontario MTO Truck Knowledge Practice Test

There are several classes of dangerous goods ranging from corrosives to hazardous materials? How many classes of dangerous goods are there?

1. Five

2. Seven

3. Nine

4. Ten

The correct answer is: Nine

There are nine classes of dangerous goods, not seven as option B suggests. Option A is not correct because there are more than five classes of dangerous goods. Option D is incorrect because there are fewer than ten classes of dangerous goods. The nine classes of dangerous goods include explosives, gases, flammable liquids, flammable solids, toxic and infectious substances, radioactive materials, corrosives, miscellaneous dangerous substances and articles, and dangerous goods that are environmentally hazardous.