New Hampshire CDL Hazmat: Hazard Classes Test 2026

The nine hazard classes are the backbone of hazmat work, and the New Hampshire hazmat hazard classes test makes sure you can tell an explosive from an oxidizer without hesitation. This 2026 CDL H endorsement quiz walks through the numbered classification system that decides how freight is handled, marked, and separated.

Questions cover Class 1 explosives, Class 2 gases, Class 3 flammable liquids, corrosives, radioactive materials, and the rest, along with how a material's class shapes the placard, the shipping paper description, and any load segregation rules. Knowing where a product falls is the first read you make on any hazardous materials shipment.

State exams vary, so treat the New Hampshire CDL Manual as your source of truth for how many hazard-class questions you will face. Drill this classification set until the nine categories are instant recall, then keep building your hazardous materials endorsement knowledge across New Hampshire for 2026.

Keep going:

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

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