CDL Hazardous Materials (H) practice test

Placarding, shipping papers, loading rules and emergency response for hazardous loads. 30 questions, every answer explained. Free, no signup.

Drawn from a bank of 51 questions, weighted across every knowledge area. The selection changes daily, but this bank is only 1.7x the test length — so most questions will repeat on a retake. Hazardous Materials (H) is a narrow subject and we would rather say that than pad the bank with reworded duplicates.

What this test covers

Federal law prescribes the knowledge areas a CDL applicant must be tested on. This bank is organized by them, and each practice test draws proportionally across all of them rather than sampling at random.

What's at stake

Also requires a TSA security threat assessment with fingerprinting, on top of the knowledge test.

Common questions

How many questions are on the real Hazardous Materials (H) test?

Test length is set by your state within the federal framework, so it varies — commonly around 50 for General Knowledge. What doesn't vary is the passing score: 80%, federally, everywhere. Confirm the question count with your state licensing agency.

Who has to take the Hazardous Materials (H) test?

Drivers hauling placarded hazardous materials.

Can I retake it if I fail?

Also requires a TSA security threat assessment with fingerprinting, on top of the knowledge test. Most states allow retakes, often after a waiting period — check with yours.

Are these the real test questions?

No. The federal question pool isn't public, states develop their own wording from it, and versions rotate. These are original questions covering the same federally required knowledge areas — which is what the real test is built from too.

The rest of the battery

A CDL is several tests, not one. See the full battery and which ones apply to you.