Commercial Driver's License Hazardous Materials (H) Endorsement Knowledge Test — 49 CFR Part 383
Hazardous materials regulations, handling, emergency equipment and emergency response — practice for the CDL hazmat (H) endorsement knowledge test, with 1,000 flashcards, 350 quiz questions and a 30-question mock.
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Everything included — in full detail
This is exactly what you unlock. No vague promises — real numbers, straight from the portal.
Your full practice pool — 350 questions total, written to mirror the real exam blueprint, with full answer explanations for every question.
Including Hazardous Materials Regulations, Hazardous Materials Handling, Operation of Emergency Equipment, and more.
A complete, realistic exam-day simulation with the same question count and time limit as the real thing.
Covering every key term, concept, and framework you're expected to know.
Hand-picked walkthroughs and explainers organized by topic.
Visual breakdowns of the frameworks and models the exam tests you on.
The exact formulas and calculations you need, ready to review before test day.
A searchable glossary so unfamiliar terminology never slows you down.
See your accuracy by domain, spot weak areas early, and follow a built-in study schedule.
Study anywhere — your progress syncs on the device you are using and picks up where you left off.
No subscriptions, no renewals — buy once and keep studying until you pass.
See the CDL Hazmat Endorsement Knowledge Test portal
Real screenshots — this is exactly what you'll be studying in. Click to zoom in.
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Topics you'll drill
4 core topics pulled straight from the real question bank.
- Hazardous Materials Regulations
- Hazardous Materials Handling
- Operation of Emergency Equipment
- Emergency Response Procedures
CDL Hazmat Endorsement Knowledge Test exam requirements & cost
Straight from the certifying body — separate from what we charge for the study portal.
The CDL Hazmat (H) endorsement knowledge test is the written test for the hazardous materials endorsement on a commercial driver's license. The knowledge standards are set federally by the Federal Motor Carrier Safety Administration (49 CFR Part 383) and the test is administered by each state driver licensing agency. The number of questions and any time limit are set by your state; this portal's practice mock has 30 questions, the length commonly described in state CDL guides. Federal rule 49 CFR 383.135 requires you to answer at least 80 percent of the questions correctly on a CDL knowledge test. Knowledge test and endorsement fees are set by each state; the federal security threat assessment required for the H endorsement has its own separate fee. The content outline spreads questions across 4 areas; the largest are Hazardous Materials Regulations (37.0%); Hazardous Materials Handling (33.0%); Operation of Emergency Equipment (15.0%). You need a commercial driver's license or commercial learner's permit, and the H endorsement also requires a federal security threat assessment (background check) before it is issued; confirm the current steps with your state licensing agency. This portal prepares you for the knowledge test; it does not replace your state CDL manual, the security threat assessment or the state application.
CDL Hazmat Endorsement Knowledge Test exam blueprint
Real domain weighting from the certifying body's own published exam syllabus.
- Hazardous Materials Regulations37%
- Hazardous Materials Handling33%
- Operation of Emergency Equipment15%
- Emergency Response Procedures15%
Real pass rate, retake policy, scoring, and a study timeline for CDL Hazmat Endorsement Knowledge Test — free, no purchase required.
Common questions
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