Wisconsin CDL practice test
Published Updated Licensing sources checked:
How do I prepare for the Wisconsin CDL knowledge test?
If you are preparing for your first permit, start with general knowledge and the official Wisconsin instructions below. If your vehicle needs air brakes or combination vehicles, add those federal study sets; for hazardous materials, use the separate hazmat set. Compare the state’s published test rules with its current manual before you test. These practice sets teach federal topics and do not copy the state exam.
This page is study material. It is not the Wisconsin state exam, and it does not copy state test questions. Check the official Wisconsin pages below before you test.
| Your situation | Start with… |
|---|---|
| A quick first try | Take a 10-question warm-up |
| Ready for a longer attempt | Take the 50-question general knowledge exam |
| Need state rules or documents | Check the Wisconsin application steps |
Wisconsin commercial driver manual (PDF) — link checked . Study its rules alongside our federal-standard bank. Our 50-question exam length is a study setting; use the official counts below for Wisconsin.
WisDOT’s CDL requirements page checked November 11, 2026 prints the counts below and a passing grade of 80 percent or more. Its table labels general knowledge B/C and lists the Class A combination test separately. All applicants must pass general knowledge; do not treat the combination count as a complete Class A exam total.
Which tests do I need in Wisconsin?
| Your vehicle or work | Required study and tests |
|---|---|
| All permit applicants | Start with general knowledge. Official requirements. Federal warm-up · Federal exam mode |
| Class A combination vehicle | Add combination vehicles. Official requirements. Federal warm-up · Federal exam mode |
| Vehicle with air brakes | Add air brakes and check restriction rules. Official requirements. Federal warm-up · Federal exam mode |
| Passenger vehicle | Add the passenger endorsement tests. Official requirements. Federal warm-up · Federal exam mode |
| School bus | Study school bus and passenger topics; check state testing requirements. Official requirements. Federal warm-up · Federal exam mode |
| Tank vehicle | Add the tank vehicle knowledge test. Official requirements. Federal warm-up · Federal exam mode |
| Hazardous materials | Add the hazmat knowledge test and check approval and training steps. Official requirements. Federal warm-up · Federal exam mode |
| Doubles or triples | Add the doubles and triples knowledge test; check state vehicle limits. Official requirements. Federal warm-up · Federal exam mode |
Wisconsin’s school bus question count and renewal testing are state-specific. Check the separate restricted farm-service rules in the manual; our federal study sets do not cover that restricted license.
Before booking the exam, check Wisconsin CDL application steps and official fee lines.
| Test | Questions | To pass | Official source |
|---|---|---|---|
| General knowledge (B/C in DMV table) | 50 questions | 80 percent | State source |
| Combination vehicles, for Class A | 20 questions | 80 percent | State source |
| Air brakes, if applicable | 25 questions | 80 percent | State source |
| Passenger | 20 questions | 80 percent | State source |
| Tank vehicle | 20 questions | 80 percent | State source |
| School bus | 25 questions | 80 percent | State source |
| Hazardous materials | 30 questions | 80 percent | State source |
| Doubles and triples | 20 questions | 80 percent | State source |
Wisconsin language, permit and booking notes — checked 2026-11-11
WisDOT says all knowledge tests are free and no appointment is necessary. Present a valid Class D license when testing; allow enough time before the customer service center closes. Official source — checked .
WisDOT lists school bus knowledge and driving skills testing at original issuance and every renewal, plus a background check. Its school bus and hazardous-materials knowledge tests are English only. Official source — checked .
Drivers adding the hazardous-materials endorsement must complete Entry-Level Driver Training before knowledge testing. Permit, license and hazmat background-check charges are separate from the free knowledge tests. Official source — checked .
For unknown figures, check with the Wisconsin licensing agency. A blank count is not an estimate.
Federal study sets, not the Wisconsin exam
Use general knowledge, air brakes, combination vehicles, and hazmat to study the federal topics. Finishing one of those sets does not mean you passed the Wisconsin test.