Free Washington CDL Practice Test
Washington uses the national CDL manual and federal question pool. Practice every knowledge test here, then check Washington’s own question counts, passing scores and fees below.
General Knowledge and every endorsement test at the length states use, three answer choices per question, scored at the real 80% pass mark with an explanation from the CDL manual for every answer.
Or start with a free 10-question drillYou hold a CLP with a tank (N) endorsement. Which tank vehicle may you operate?
Washington CDL knowledge tests
| Test | Questions | Correct to pass | Practice |
|---|---|---|---|
| General Knowledge | 50 | 40 | General Knowledge practice |
| Air Brakes | 25 | 20 | Air Brakes practice |
| Combination Vehicles | 20 | 16 | Combination Vehicles practice |
| Hazardous Materials | 30 | 24 | Hazardous Materials practice |
| Tank Vehicles | 20 | 16 | Tank Vehicles practice |
| Doubles and Triples | 20 | 16 | Doubles and Triples practice |
| Passenger Transport | 20 | 16 | Passenger Transport practice |
| School Bus | 20 | 16 | School Bus practice |
Practice before your WA knowledge tests
General Knowledge and every endorsement test at the length states use, three answer choices per question, scored at the real 80% pass mark with an explanation from the CDL manual for every answer.
Or start with a free 10-question drillTaking the tests in Washington
- Where
- By appointment at a Department of Licensing office that offers CDL testing. Tests are offered in English, Spanish, Russian and Serbian-Croatian, and interpreters are not allowed.
- Commercial learner’s permit
- You must pass the knowledge tests to get a CLP. Knowledge test scores are valid 180 days, plus another 180 days if you renew the CLP within 30 days of it expiring. Doubles/Triples and Hazmat scores do not carry over with a CLP renewal.
- If you fail
- The $35 fee covers one attempt at each knowledge test within 90 days, so a retest needs a new fee.
- Good to know
- The Tank Vehicles test is needed for the CLP only if you will train or test in a tank vehicle.
Washington CDL fees
- CDL knowledge test (one attempt at each test within 90 days): $35
- Commercial learner’s permit: $40
Washington CDL test questions
How many questions are on the Washington CDL permit test?
The Washington General Knowledge test has 50 questions and you need 40 correct. Air Brakes: 25 questions, 20 to pass; Combination Vehicles: 20 questions, 16 to pass; Hazardous Materials: 30 questions, 24 to pass; Tank Vehicles: 20 questions, 16 to pass; Doubles and Triples: 20 questions, 16 to pass; Passenger Transport: 20 questions, 16 to pass; School Bus: 20 questions, 16 to pass.
Where do I take the CDL knowledge tests in Washington?
By appointment at a Department of Licensing office that offers CDL testing. Tests are offered in English, Spanish, Russian and Serbian-Croatian, and interpreters are not allowed.
How much does a Washington CDL permit cost?
the Washington State Department of Licensing lists: CDL knowledge test (one attempt at each test within 90 days) $35; Commercial learner’s permit $40.
What if I fail a CDL knowledge test in Washington?
The $35 fee covers one attempt at each knowledge test within 90 days, so a retest needs a new fee.
Ready for the knowledge tests?
General Knowledge and every endorsement test at the length states use, three answer choices per question, scored at the real 80% pass mark with an explanation from the CDL manual for every answer.
Or start with a free 10-question drillMore CDL practice
- CDL General Knowledge practice test
- CDL Air Brakes practice test
- CDL Combination Vehicles practice test
- CDL Hazardous Materials practice test
- CDL Tank Vehicles practice test
- CDL Doubles and Triples practice test
- CDL Passenger Transport practice test
- CDL School Bus practice test
- Illinois CDL practice test
- Pennsylvania CDL practice test
- Michigan CDL practice test
- Missouri CDL practice test
Washington facts are from the Washington State Department of Licensing, checked October 2026: WA DOL: CDL knowledge test · WA DOL: driver licensing fees.
Original independent practice. Not affiliated with or endorsed by the Washington State Department of Licensing, FMCSA or AAMVA.