Choose the CDL test you need. Find out what to study next.
Start with ten free questions and a breakdown by topic. No account or payment is needed for the diagnostic. Review why the answers differ, then focus your next session on a weak domain.
Start the free CDL diagnosticYour vehicle determines your study path
1. General knowledge
Start with driving safety, inspection, space management and hazard decisions.
Explore this practice test2. Air brakes, when applicable
Connect components, inspections and braking decisions for an air-brake-equipped vehicle.
Explore this practice test3. Combination vehicles, when applicable
Study coupling, inspection and handling for combination vehicles.
Explore this practice test4. Endorsements for your work
Hazmat knowledge practice is separate from the TSA assessment and licensing process.
Explore this practice testCheck your state’s requirements first
The required knowledge tests, paperwork and licensing steps depend on your state and vehicle. Use our CDL requirements tool to begin, then confirm the current requirements with your licensing agency. Texas applicants can start here.
What happens after the diagnostic?
You see the topics you missed and can create a free account to save your result. Full access costs $19.99 per month for the catalog or $39.99 once for a single exam. A short diagnostic is a study aid, not a guarantee of passing.
These are original practice questions. They do not issue a CDL, replace required training or provide behind-the-wheel instruction. Read our editorial process.
Preparing for a CDL test soon?
Join the learner pilot and help us improve the first study session. Participation is optional and does not require a purchase.