New Mexico CDL Hazmat: Hazard Classes Test 2026

The nine hazard classes are the backbone of the hazmat knowledge exam, and this New Mexico practice test makes memorizing them far less painful. From explosives and flammable gases to corrosives, oxidizers, and radioactive materials, every class carries its own handling rules that the 2026 CDL hazmat test expects you to recognize on sight.

These questions train you to match a material to its class number, read the hazard class column on a shipping paper, and understand why segregation and compatibility matter when loads share a trailer. Knowing your hazard classes cold is what makes placarding, marking, and shipping-paper questions feel obvious later, so this is a smart section to master early.

New Mexico sets its own length for the endorsement exam, so check the hazardous materials chapter of the New Mexico CDL Manual for the exact number of questions you will face. Keep cycling through this hazard classes practice test until each of the nine is second nature.

Keep going:

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

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