Tennessee CDL Hazmat: Hazard Classes Test 2026

Nine hazard classes sort every hazardous material a Tennessee CDL driver might ever haul, from explosives and gases down to corrosives and miscellaneous dangerous goods, and mixing them up is the single most common miss on a hazmat practice test.

This hazard classes drill covers the class numbers, the general nature of each category, and why certain classes can never share a trailer or a loading dock with each other under federal hazmat rules that Tennessee enforces at the roadside.

Match every class number to its real description using the Tennessee CDL Manual as your reference point rather than memorizing this page alone. Nail the hazard classes and the rest of the hazmat endorsement test in 2026 stops feeling like guesswork.

Keep going:

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

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