The Hazardous Materials (H) endorsement lets you haul placarded hazmat — and it requires a TSA background check on top of the written test. Our 50 practice questions cover the rules that keep these loads safe, with an explanation on every answer.
Start the Hazmat practice test →Covers the nine hazard classes, placarding (placards on all four sides), shipping papers and the hazardous materials table, the Emergency Response Guidebook, loading and segregation of incompatible materials, parking and attendance rules, railroad crossings, and how to respond to leaks and spills.
Each question on CDL Prep Hub comes with a plain-English explanation, so you learn the "why" behind every answer. Aim for 80% or better — that's the passing mark in most states — then take the timed exam simulator to rehearse the real format. No account needed; your best scores save in your browser.
Start the Hazmat practice test →Study material based on the official CDL manual. Not the official state exam — always review your state's CDL handbook before testing.