Washington CDL practice test

Getting a commercial driver's licence in Washington starts with the CDL knowledge tests. The content is federal: every state, Washington included, writes its tests from the FMCSA CDL manual, so the general knowledge test has 50 questions, the endorsement tests have 20 to 30, and the passing score is 80% on each. Washington State Department of Licensing administers the test; the rules behind it are published by the FMCSA. Try the free Washington CDL practice questions below, then pick a full test.

50general knowledge questions
80%passing score on every test
8knowledge tests covered
WApick your state once in the app

Free Washington CDL practice quiz

Five questions from the general knowledge, air brakes and combination vehicles banks, the three tests most Washington Class A applicants take first. Tap an answer to see if you were right and read the explanation.

0 of 5 right0 of 5 answered

The service air line carries air to the trailer brakes whenever you:
What happens if the emergency (supply) line breaks or pulls loose while you are driving?
To connect a pair of glad hands correctly, you should:
When you are driving without a trailer, the tractor's air hose couplers (glad hands) should be:
You cross the air lines when coupling (service to emergency and emergency to service) on an older trailer that has no spring brakes. What could happen?

Every CDL test for Washington drivers

Each page has a free ten-question quiz, the real question count, the 80% pass mark and what the test covers.

How the Washington CDL knowledge test works

You take the general knowledge test first; it is required for every CDL class. Class A drivers add the combination vehicles test. Almost everyone takes the air brakes test, because skipping it puts an air brake restriction on the licence. Endorsements (hazmat, tanker, doubles/triples, passenger, school bus) each have their own knowledge test. Pass the tests and you hold a commercial learner's permit; the skills test in a truck comes later.

Fees, appointment rules and test centre locations are set by Washington; the current ones from Washington DOL are in the next section. What does not change is the content, and that is what PassRig drills.

Washington CDL fees and rules

In Washington the CDL is issued by the Washington State Department of Licensing. The figures below are taken from its own pages and were last checked on 2 November 2026. Fees and rules change, so confirm with the agency before you go.

Study from the state's own book: Washington Commercial Driver License Guide. PassRig's questions are written from the same FMCSA manual it is based on.

What	WA	Source
Learner's permit fee	$40	dol.wa.gov
CDL fee	$20 plus $17 per year remaining on your licence ($37 to $156)	dol.wa.gov
Knowledge test fee	$35	dol.wa.gov
Retest fee	Test fee covers one attempt at each knowledge test taken within 90 days of the receipt	dol.wa.gov
Permit valid for	180 days; renewing within 30 days of expiry gives an additional 180 days	dol.wa.gov
Minimum age	Over 18 with a valid WA driver licence to apply for a CLP; at least 21 to drive interstate	dol.wa.gov
Appointment	Appointment required at a driver licensing office that offers testing	dol.wa.gov
Test languages	English, Spanish, Russian and Serbo-Croatian; interpreters not allowed	dol.wa.gov
Medical certificate	Self-certify when applying; medical examiner uploads your certificate to the National Registry	dol.wa.gov
Entry-level driver training	Approved provider must complete and enter your training before the skills test; federal ELDT rules apply	dol.wa.gov
Also worth knowing	Wait 14 calendar days after an original or upgraded CLP is issued before taking the skills test	dol.wa.gov

5 official pages from Washington DOL were read for this section. Nothing on it is estimated.

Washington CDL test questions

How many questions are on the Washington CDL test?

The Washington CDL general knowledge test follows the federal model: 50 questions, 40 correct to pass. Endorsement tests are shorter: air brakes 25, hazmat 30, and combination vehicles, tanker, doubles/triples, passenger and school bus 20 each.

What is the passing score on the Washington CDL permit test?

80% on every knowledge test, the same pass mark used across the United States.

Where do I take the CDL knowledge test in Washington?

Washington State Department of Licensing gives the test. Appointment required at a driver licensing office that offers testing The test content itself comes from the FMCSA CDL manual.

How much does a CDL permit cost in Washington?

Washington DOL lists the commercial learner's permit fee as $40. Fees change, so check the agency's fee page before you go.

Does PassRig have Washington CDL practice questions?

Yes. Pick Washington in the app and you get practice sets and mock exams built from the knowledge test content your state uses, with the real counts and the 80% line.