Can I see what I got wrong after a test?

Yes. The result screen shows your score, every missed question, the right answer and an explanation, and no ad covers it. Misses are also saved to your mistakes notebook.

What score do I need to pass the CDL permit test?

Federal rules (FMCSA) require at least 80% on each CDL knowledge test. The number of questions can vary by state, so check your state CDL manual.

Does it cover air brakes and hazmat?

Yes. Topics are General Knowledge, Air Brakes, Combination Vehicles, Hazmat, Tanker, Doubles and Triples, Passenger and School Bus.

If I close the app mid-test, do I lose my progress?

No. Sets and mock tests in progress are saved automatically. Tap Continue on the home screen.

Do I need an account or internet?

No account. Questions are built into the app, so you can practice offline.

Yes. It is free and supported by ads, which appear only between sets, never during a question or on your results.

Are these the real DMV test questions?

No. Questions are written from public CDL manual guidelines. Haulprep is a study aid and is not affiliated with FMCSA or any state DMV.

How many questions are in the mock test?

The General Knowledge mock test has 50 questions and each endorsement mock test has 25.

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How to prepare for the hazmat endorsement test

To haul placarded hazardous materials you need the hazmat (H) endorsement on your CDL. Passing the knowledge test is not enough: you also need a TSA security threat assessment, which includes fingerprints and a background check, and first-time applicants must complete ELDT theory training.

Steps in order

Complete hazmat ELDT theory training with a registered provider (first-time applicants)
Apply for the TSA security threat assessment and get fingerprinted
Take the hazmat knowledge test at your state DMV (80% to pass)

What the test focuses on

Hazard classes 1 to 9 and placards
Shipping papers and emergency response information
Loading and segregation rules
What the driver must do after a crash or leak

Check before you go

Fees, processing time and whether you must retest at renewal depend on your state and can change. Check your state DMV and TSA before you apply.

Doing it with Haulprep

Practice the Hazmat topic in Haulprep 10 questions at a time and read each explanation. Retry misses from your mistakes notebook and finish with the 25-question mock test.

Note

This guide is general study information. Question counts, fees and test procedures vary by state and can change, so always check your state's current CDL manual and DMV. Haulprep is not affiliated with FMCSA or any state DMV. Official source: https://www.fmcsa.dot.gov/cdl

Hazmat: retry only what you missed

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