New Jersey CDL Hazmat: Hazard Classes Test 2026

Nine hazard classes, and the New Jersey CDL hazmat exam expects you to recognize every one of them. This hazmat hazard classes test walks through explosives, gases, flammable and combustible liquids, flammable solids, oxidizers and organic peroxides, poisons and infectious substances, radioactive materials, corrosives, and the miscellaneous class that catches everything else. Knowing the class number is only half of it; the exam wants you to link a class to its placard, its segregation rules, and the loading restrictions that follow.

The CDL hazard classes practice questions here also cover division numbers, why some classes may never travel together in one trailer, and how the class drives the routing choices a New Jersey driver makes on chemical and petroleum runs along the corridor.

Do not assume a question count. The New Jersey CDL Manual published by the New Jersey MVC lists exactly how long the hazardous materials endorsement test runs in 2026. Use this hazard classes drill to make the table automatic instead of something you look up.

Keep going:

• New Jersey Hazmat Practice Test
• New Jersey Hazmat Practice Test 2
• New Jersey Hazmat Practice Test 3
• New Jersey Hazmat Endorsement Test
• New Jersey CDL Practice Test
• New Jersey Air Brakes Practice Test
• New Jersey CDL Combination Practice Test
• New Jersey CDL Pre-Trip Inspection Practice Test
• New Jersey Class A CDL Practice Test
• New Jersey CDL Practice Test

Every question traces back to the New Jersey CDL Manual - skim the right-of-way and signs chapters before your retake.