CDL HAZMAT (H) Endorsement Practice Test

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Practice Test Instructions:

  • Choose the best answer and receive instant feedback.
  • Click next to go to the next question.
  • Check your results at the end.
  • Start a new version and keep studying!


Each test contains questions based on information in the official driver's handbook.

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How to Use this Free CDL Written Practice Test

Each free practice test includes 15 multiple-choice questions based on the CDL manual. You can take the test as many times as you want.

Each time you take the test, you will receive a new set of 15 questions. The questions are generated randomly, so you can be sure that you are practicing a wide range of topics.

Before you know it, you will be ready to pass your written test and get your Commercial Learner’s Permit!

Get some more practice with the HAZMAT Exam Simulation.

What is the CDL HAZMAT Knowledge Test?

  • Number of Questions: 30
  • Passing Score: 80%
  • Format: Multiple Choice & True/False

The Hazardous Material knowledge exam covers the Hazardous Materials section (Section 9) of the CDL Manual.

Information in this section includes:

  • Roles and responsibilities for transporting hazardous materials.
  • Communication rules.
  • Loading and unloading hazardous material.
  • Driving and parking rules.
  • Handling HAZMAT emergencies.
  • Hazardous Materials terms and definitions.

The HAZMAT knowledge exam consists of 30 multiple choice and true false questions from the CDL Manual. You’ll need a score of 80% to pass (24 answers correct).

You can prepare for your Hazardous Material Endorsement written test by studying the appropriate section of the CDL Manual and taking our free practice tests.

Who needs to take the HAZMAT Test?

Any CDL driver who wants to transport hazardous materials is required to pass the Hazardous Materials Knowledge exam and receive the HAZMAT (H) Endorsement for their CDL.

The HAZMAT Endorsement also requires the applicant to pass a Transportation Security Administration (TSA) background check.

Upon passing the HAZMAT Knowledge test, your CDL will qualify you to transport hazardous materials cargo in vehicles that coincide with your class of CDL.

The H Endorsement will require periodic re-testing, and you’ll need to keep your security/background assessments up-to-date.