What Is on the Hazmat Endorsement Test?

The hazmat test is a state knowledge exam drawn from the hazardous materials section of the CDL manual. It covers what counts as hazmat, the nine hazard classes, shipping papers, marking and labeling, placarding, safe loading and unloading, bulk packaging, emergency response and security awareness. Typically around 30 questions with 80% to pass — though the count and passing score vary by state. There is no skills test for hazmat. Knowledge only.

Your ELDT has to be in the registry before you can test
And it only counts if the provider was listed when you trained. Check any provider — including us.
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Where the test fits — and the ordering that costs weeks

Three things have to happen for a first-time hazmat endorsement. Two of them run at the same time, and most drivers don’t realise it.

  1. Complete hazmat ELDT. Required before you can sit the test. Under 2 hours, submitted to the FMCSA registry within 24 hours. Start it here — $20.
  2. Start the TSA background check the same day. This takes 4–8 weeks and it’s the only real bottleneck. Book fingerprinting immediately — don’t wait until after the test.
  3. Take the knowledge test while TSA processes. In most states you can sit it as soon as your ELDT shows in the registry. You do not need TSA clearance first.
This is where the weeks go. If you treat those as strictly sequential — finish ELDT, pass the test, then start TSA — you add a month or two to a process that didn’t need it. Nothing about the knowledge test depends on TSA in most states. A few states sequence it differently, and agent states such as Texas issue the fingerprinting code only after you apply in person, so confirm the order with your state licensing agency first. Full timeline →

Start Hazmat ELDT — $20

What the test covers

  • What hazmat is and what the rules are for — contain the material, communicate the risk, and ensure safe drivers and equipment.
  • The nine hazard classes — how materials are categorised (explosives, gases, flammables, corrosives and the rest) and what each class means in practice.
  • Shipping papers — proper shipping names, ID numbers, hazard classes, and the emergency contact information that has to be on them.
  • Marking and labeling — the diamond hazard labels and package markings that communicate what’s inside.
  • Placarding — which placards the vehicle needs based on class and quantity, and where they go: front, rear and both sides.
  • Loading and unloading — securing the load, segregating incompatible materials, and protecting cargo from heat and damage.
  • Bulk packaging and cargo tanks — ID number display, capacity, and specialised loading procedures.
  • Emergency response — what to do with leaks, fires and spills while protecting yourself and the public.
  • Security awareness — recognising and responding to potential security threats in transport.

The two topics drivers actually fail on

Most of the material above is general principle you’ll absorb from the course. Two areas aren’t, and they account for a disproportionate share of failures.

Placarding thresholds. The rule isn’t one rule — Table 1 materials need placards at any quantity, while Table 2 materials only at 1,001 pounds or more gross weight. Questions on this are designed to catch anyone who learned “placard if it’s hazmat” and stopped there.

The segregation table. Which materials can’t travel together, and the codes that express it. There’s no principle to reason from — you either know the table or you guess.

Both are memorisation, not comprehension. Which is why practice questions matter more on this test than on most. Our hazmat test prep is 100 questions including a full 30-question exam simulation at the real length, with an explanation on every answer and heavy drilling on exactly these two topics. $15 on its own, or $30 bundled with the ELDT course— which saves $5.


How to prepare

Read the hazardous materials section of your state’s CDL manual closely — the questions come from it. Your hazmat ELDT course builds the underlying knowledge and is aligned to what’s on the exam, so drivers who actually work through the material tend to pass first time.

If you want to walk in having already seen the format, add the practice test. Unlimited attempts, scored by topic, so you can drill only what you missed.

For the wider picture: what a hazmat endorsement costs, how long it takes, and whether you need ELDT.

Going for the X endorsement?

If you haul fuel or chemicals in a tank you need tanker as well as hazmat — together they show as the X endorsement. Tanker requires no ELDT and no background check, just a knowledge test. So you can go and take that one while your hazmat TSA check is still processing and have an endorsement in hand rather than none. Tanker practice test — $15 · Hazmat & Tanker Complete — $45

Get Test-Ready

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Hazmat ELDT — $20 Test Prep — $15 Both — $30 Your State’s Test
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Test topics are based on the hazardous materials section of the CDL manual. Question count, passing score and the order in which your state sequences the test and the TSA check all vary — confirm the current details with your state licensing agency before you test. Training only counts if your provider is listed on the FMCSA Training Provider Registry; training conducted after a provider’s removal date is considered invalid.