To get a Commercial Learner Permit in Washington, you take the CDL permit test at a Department of Licensing (DOL) office — a written, multiple-choice knowledge exam built from the Washington CDL Guide. The general knowledge portion runs 50 questions, and you need at least 80 percent correct to pass. Depending on the class of CDL you want and the endorsements you plan to carry, you may sit for additional knowledge tests the same day.
Which Tests You’ll Take
Your CDL class decides your test slate. Washington issues three:
- Class A covers combination vehicles with a gross combined weight rating of 26,001 pounds or more where the towed unit weighs over 10,000 pounds — tractor-trailers, flatbeds, tankers.
- Class B covers single vehicles of 26,001 pounds or more, or those towing a trailer under 10,000 pounds. Dump trucks, large delivery trucks, and buses fit here.
- Class C covers vehicles carrying 16 or more passengers (including the driver) or hauling hazardous materials, when the vehicle doesn’t meet the Class A or B weight thresholds.
Class A applicants pass both the general knowledge test and the combination vehicles test. Class B applicants take the general knowledge test alone, unless they want endorsements. Class C applicants take the general knowledge test plus the endorsement test that matches their cargo or passengers.1Washington State Department of Licensing. Types of CDLs
Endorsements each come with their own knowledge test: air brakes (25 questions), combination vehicles (20), tanker (20), doubles/triples (20), passenger (20), hazardous materials (30), and school bus (20). Every section requires 80 percent to pass. On the 50-question general knowledge test that’s 40 correct answers; on a 20-question endorsement, 16; on air brakes, 20 of 25; on hazmat, 24 of 30.
About air brakes: if you skip or fail that test, an “L” restriction goes on your permit and your eventual CDL, locking you out of any vehicle with air brakes. Most commercial trucks have them, so the restriction narrows your job options sharply. Plan to take and pass it.
Who Can Apply
You must be at least 18 and hold a valid Washington driver’s license.2Washington State Legislature. Washington Code 46.25.052 Eighteen gets you intrastate driving only. To cross state lines or haul hazardous materials, federal rules require you to be 21.3Federal Motor Carrier Safety Administration. How Do I Get a Commercial Driver’s License?
Your record matters. DUI convictions, leaving the scene of an accident, and certain serious traffic violations can disqualify you. Washington also queries the FMCSA Drug and Alcohol Clearinghouse before issuing a CLP. A “prohibited” status from an unresolved drug or alcohol program violation will block the permit until you finish the return-to-duty process.4FMCSA Drug and Alcohol Clearinghouse. Clearinghouse II SDLA Requirements
What to Bring to the DOL Office
Bring originals. Photocopies are not accepted.
- Proof of U.S. citizenship or lawful permanent residency — one federally approved government-issued document such as a U.S. passport, birth certificate, or permanent resident card.
- Social Security number verification, such as your Social Security card or a W-2.
- Two documents showing your current Washington address, like utility bills, bank statements, or a mortgage document.
CDL rules on citizenship and the SSN are stricter than for a standard license. The declaration process some non-CDL applicants use when they lack an SSN is not available here.5Washington State Department of Licensing. CDL-Approved Documents
You also need to self-certify into one of four categories describing the driving you plan to do: non-excepted interstate, excepted interstate, non-excepted intrastate, or excepted intrastate. If you fall into either “non-excepted” category, bring a Medical Examiner’s Certificate (Form MCSA-5876) completed by a provider on the FMCSA’s National Registry of Certified Medical Examiners.6Washington State Department of Licensing. Medical Certificates and Self-Certification The exam checks vision, hearing, blood pressure, and general physical fitness. Without that certificate on hand, the DOL will not process your CLP application.7Federal Motor Carrier Safety Administration. Medical Examiners Certificate Commercial Driver Medical Certification
What the Knowledge Test Covers
Questions are drawn directly from the Washington CDL Guide, which the DOL offers as a free download and in print at licensing offices.8Washington State Department of Licensing. Commercial Driver Guides Topics on the general knowledge exam include pre-trip vehicle inspections, safe driving techniques, speed management, road hazards, hours-of-service awareness, and post-crash procedures. A supplemental guide covers additional material. Both are the source documents; the questions pull from them almost line by line.
Endorsement tests go deeper into specialized equipment. Air brakes covers how the system works, inspection steps, and what to do when you lose air pressure. Combination vehicles focuses on coupling and uncoupling, rollover risks, and jackknife prevention. Tanker covers the physics of hauling liquids — surge, stopping distance, and stability with partially full tanks. Doubles/triples addresses handling with multiple trailers. Passenger covers loading, unloading, emergency exits, and passenger management. Hazmat tests placarding, containment rules, and emergency response. School bus covers loading zones, student management, and railroad crossing procedures.
Fees
- CLP issuance: $40
- Each knowledge test: $35
- Skills test (later, for the full CDL): $175
These add up when you need multiple tests. A Class A applicant taking general knowledge, air brakes, and combination vehicles pays $40 for the CLP plus $35 × 3 in test fees, or $145 before touching a truck.9Washington State Department of Licensing. Driver Licensing Fees Fail a test and you pay the test fee again on every retake.
Taking the Test at the DOL
You need a DOL office that provides commercial driver services. Not every location handles CDL testing, so check the DOL site first. Appointments aren’t required but are strongly recommended for knowledge tests.10Washington State Department of Licensing. Driver Licensing Offices
Staff will verify your identity documents, Washington residency, Social Security number, and medical certification. You’ll also take a vision screening. Federal standards require at least 20/40 acuity in each eye (with or without corrective lenses), a field of vision of at least 70 degrees in each eye, and the ability to distinguish red, green, and amber.11eCFR. 49 CFR 391.41 Bring your glasses or contacts if you wear them. If you don’t meet the standard at the counter, you may be referred to an eye care specialist for a visual examination report.12Washington State Department of Licensing. Medical and Vision Screening
Knowledge tests are taken on computer terminals, and results come up immediately. Pass everything and you leave with a temporary paper permit that lets you start supervised driving right away. The permanent CLP card arrives by mail at your Washington address.
After You Pass: Permit Limits and the 14-Day Wait
The CLP is a learner’s permit, not a license. Any time you drive a commercial vehicle, a qualified CDL holder has to be with you. They must sit in the front passenger seat (or directly behind you on a bus), hold the correct CDL class and endorsements for the vehicle, have at least two years of experience in that vehicle type, and at least five years of total driving experience.13Washington State Department of Licensing. Commercial Learners Permit (CLP)
What you can’t haul on a CLP:
- No hazardous materials under any circumstances.
- No passengers beyond your supervisor, other trainees, and examiners, even if you have the P or S endorsement.
- Tankers must be empty and free of hazardous residue, even with the N endorsement.
Violations put your permit and future CDL eligibility at risk.14eCFR. 49 CFR 383.25
Washington CLPs are valid for up to 180 days from issuance.2Washington State Legislature. Washington Code 46.25.052 If yours expires before you complete the skills test, you retake the knowledge tests and pay the fees again. Federal rules also impose a 14-day waiting period after your CLP is issued before you can take the skills test, so you can’t test straight into a CDL on day one.13Washington State Department of Licensing. Commercial Learners Permit (CLP) Before the skills test, most new drivers also have to complete Entry-Level Driver Training through an FMCSA-registered provider, but that requirement sits between the CLP and the full CDL, not before the permit test itself.15Federal Motor Carrier Safety Administration. Entry-Level Driver Training (ELDT)
How to Study
Most people who fail skimmed the manual. The Washington CDL Guide and the supplemental guide are free from the DOL website, and every question traces back to them.8Washington State Department of Licensing. Commercial Driver Guides Read them twice. The first pass gives you the shape of the material; the second is where you lock in stopping distances, inspection sequences, and weight limits.
Give air brakes extra time even if you think you know the system. It carries the highest question count of any endorsement test and gets into fine detail, from governor cut-in and cut-out pressures to the exact steps of a brake check. Treat it as a real study block, not an afterthought. The “L” restriction is one of the most common and most avoidable mistakes new CDL applicants make.