All-in Bundle
Class A, air brakes, hazmat and every endorsement, the cheat-sheet set and the video course.
- 6,400+ practice questions across every test
- 200+ mocks in the Washington format
- 35+ pages of cheat sheets (PDF)
$54.99See the bundle
CDL · United States
Practice for your CDL knowledge tests, one test at a time.
To get a CDL you pass written knowledge tests: general knowledge for every class, plus a test for air brakes, combination vehicles and each endorsement you add. Our packs are knowledge-test practice, not Entry-Level Driver Training (ELDT).
Knowledge tests in WashingtonQuestions · to pass
General knowledge (Class A, B and C)50 · 40
Air brakes25 · 20
Combination vehicles (Class A)20 · 16
Hazardous materials30 · 24
Tank vehicles20 · 16
Doubles and triples20 · 16
Passenger20 · 16
School bus20 · 16
These are the lengths and pass marks Washington publishes, and our mocks follow them. Other states can differ, so check your state's commercial driver manual or licensing office. Source: CDL knowledge test (Washington State Department of Licensing), dol.wa.gov, checked 26 Oct 2026.
Pick a pack
Start with the Class A Core Pack, then add the endorsements you need. The All-in Bundle has every pack and the video course.
Class A Core Pack
General knowledge, air brakes and combination vehicles, with timed mocks for each test.
- 2,800+ practice questions across the three tests
- 30+ mocks in the Washington format
$39.99See the pack
Air Brakes Drill
Air brakes questions, the brake-check sequence step by step, and a cheat sheet.
- 750+ air brakes questions
- 7 page cheat sheet (PDF)
$9.99See the pack
Hazmat Endorsement Pack
Hazardous materials questions and mocks, a placard and hazard-class deck, and a segregation cheat sheet.
- 950+ hazmat questions
- 10+ hazmat mocks
- 100+ placard and hazard-class flashcards
$17See the pack
Endorsements Bundle
Tank, doubles and triples, passenger and school bus practice, plus the Hazmat pack.
- 1,600+ endorsement questions, hazmat included
- 100+ endorsement mocks, hazmat included
- 100+ placard and hazard-class flashcards
$24.99See the pack
Printable Cheat-Sheet Set
One-page summaries of each knowledge test to print and keep in the cab.
- 6+ one-page cheat sheets (PDF)
$7.99See the pack
Video Course
Narrated lessons with captions on the knowledge tests.
- Narrated lessons with captions
$15See the pack
Free
Air Brakes Cheat Sheet + General Knowledge Diagnostic
A one-page air brakes summary to print or keep on your phone, plus a general knowledge diagnostic with a topic report. More about it
- We fix it or refund itIf a pack doesn't work because of a problem on our side.
- Instant accessYour pack opens as soon as you pay.
- Independent publisherOur own questions and guides, not affiliated with any exam body.
- Secure checkoutPayments handled by Lemon Squeezy.
Questions
Is this official?
No. Prepanchor is a private company, not affiliated with FMCSA, any state DMV or any other licensing agency. We write our own questions. Explanations are based on state CDL manuals, in our own words.
Is this CDL training?
No. It is knowledge-test practice, not Entry-Level Driver Training (ELDT). FMCSA's ELDT rules apply to anyone getting a Class A or Class B CDL for the first time, upgrading from Class B to Class A, or getting a school bus, passenger or hazmat endorsement for the first time. That training comes from a registered training provider. Who needs ELDT, on fmcsa.dot.gov.
Is the test the same in every state?
No. Each state gives its own knowledge tests. Our mocks follow the lengths and pass marks Washington publishes, and the topics come from state CDL manuals. Check your own state's manual and licensing office for its format.
Can I buy just one part?
Yes. Each pack covers one part of the knowledge tests. If you buy the All-in Bundle later, the price of a pack you already own comes off at checkout.
Is there a Spanish version?
No. Our CDL packs are in English only.