About the HazMat (H) Test
The HazMat endorsement is required any time your load has to display hazardous-materials placards. It's one of the most valuable codes you can add, and also the most involved: beyond the written test you must pass a TSA Threat Assessment, which includes fingerprinting and a federal background check that can take several weeks.
The knowledge test itself is regulations-heavy. You'll face questions on the placarding tables, shipping paper requirements, loading and segregation rules, the hazard classes, bulk packaging, and emergency response. It's typically around 30 questions with an 80% passing bar, though your state sets the exact terms.
What Test-Takers Miss Most
- 1The placarding tables — Which materials require placards at any amount versus only above 1,001 pounds is a classic trap. Learn Table 1 versus Table 2.
- 2Shipping paper requirements — Where papers must be kept, what the description must include, and the emergency response information rules.
- 3Loading and segregation — Which hazard classes can't travel together, and the rules for securing and bracing hazmat loads.
Choose Your State
Each state's test reflects its own CDL handbook, question count, and passing score. Pick yours to start a free HazMat (H) practice test built for 2026.