The CDL Hazmat test is usually made up of 30 questions, although this may differ. To pass your CDL Hazmat test, you’ll need to receive a score of 80%. This score correlates to 24 correct answers or more. Your hazmat training questions and practice will prepare you with the necessary information for the final test. It's important to fully understand the material before taking your test so you can make the most of your training. Questions on your hazmat endorsement test can apply to any part of the transport or safety process. You should come prepared with knowledge of hazmat packaging, appropriate labeling, understanding emergency responses and managing proper conditions. Your hazmat training is essential for your success on the test.