Study guides / Endorsements

CDL Hazmat Endorsement Study Guide

Published June 24, 2026

The hazmat (H) endorsement requires a written test on placards, loading, security, and emergency response. Many drivers need it for fuel, chemicals, or classified cargo.

Topics on the hazmat exam

  • Placard colors and hazard classes
  • Loading and segregation rules
  • Security plans and forbidden materials
  • Emergency procedures and reporting

How to study

  1. Read your state CDL manual hazmat chapter.
  2. Practice with our CDL hazmat practice test (Pro).
  3. Schedule TSA background clearance if required in your state before testing.

Pair hazmat prep with general knowledge and air brakes if your vehicle uses air brakes.

PassCDL Pro unlocks the full hazmat question bank and unlimited retakes.

Educational practice only — verify state requirements before your DMV visit.

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