CDL knowledge test course
State-specific commercial driving practice for CDL knowledge and endorsement tests, with mock tests and audio lessons built around the manual you will be tested on.
Ready to study? — Start hereHow it works
- 01
Plan
A short setup uses your licence goal, test date and available study time to shape an initial routine.
- 02
Learn
Audio chapters and bite-sized lessons fill the gaps — perfect for your commute or a coffee break.
- 03
Practise
Targeted drills and full timed mocks help you track weak topics and build a steadier score trend.
What's in this course
State-specific DMV practice for Commercial driver's license, organised by key handbook topics with plain-English explanations.
Knowledge test centers
Browse source-verified knowledge test locations, official service evidence, status and published hours where available.
Frequently asked questions
Everything you need to know about the CDL knowledge test before you book.
Question counts vary by state. Drivings adapts your practice to the state you choose and keeps mock tests focused on the handbook you will be tested on.
DMV fees vary by state and are paid through your local licensing agency. Check your state DMV site before booking.
In most states, yes. Drivers usually need to pass the relevant written knowledge test before scheduling behind-the-wheel testing.
Check your state's waiting period before retaking it, then use your result to focus the next practice sessions. Eligible subscribers can submit an official result under the evidence, completion and timing rules in our refund policy.