The questions on a Commercial Driver's License HazMat Endorsement practice test cover topics such as what placards to display for various types of materials, including explosives or toxic chemicals, as well as the proper practices for checking certain types of tires. The tests also ask about different driving safety practices, such as the distance to stop before railroad tracks.
The HazMat Endorsement test proves a thorough understanding of how to handle the transportation of various types of hazardous materials by the vehicle operator. It includes sections of the proper techniques of driving to ensure the safety of the hazardous cargo from actions within the driver's control, plus questions about how to defensively protect cargo from other drivers. Many of the questions on the practice test focus on these tactics, along with the actions to take after getting into an accident. The test also covers questions on how to display the appropriate notifications for the different types of hazardous materials in the cargo.
Other questions on the test focus on the procedures for responding to different situations that may arise during the transportation. For example, the test may ask what to do after discovering a leaking container or how to extinguish a fire when transpiration causes an explosion. The test also asks questions on the safest methods for loading and unloading various types of hazardous materials. Questions may also focus on what types of floor liners are acceptable for each material type.