Washington's CDL manual and DMV CDL Practice Tests

for all endorsements

Washington's CDL Manual

Commercial Driver Handbook

Minimum Requirements For Getting A CDL In Washington:

  • 18 years or older with a valid Washington driver license.
  • Proof of U.S. Citizenship, Lawful Permanent Residency, or on-domicile document.
  • Self-certify the type of operation you will be conducting. Medical documents may be required.
  • Pass the Knowledge test for the type of vehicle you will be licensed to operate.
  • Get a Commercial License Permit (CLP).
  • Submit your training certificate to CDLtrainingcerts@dol.wa.gov for approval.
  • Schedule and pay for your skills test.
  • Conduct and pass the skills test.

Washington Disqualifications A CDL be suspended, revoked, or disqualified for any of the following violations:

  • Conviction in court for driving a motor vehicle under the influence of alcohol or drugs
  • Deferred prosecution (DUI conviction)
  • Driving a commercial motor vehicle with a blood alcohol content of 0.04 or more
  • Refusing to submit to a breath or blood test while driving any motor vehicle
  • Leaving the scene of an accident involving a motor vehicle
  • Using any motor vehicle in the commission of a felony
  • Driving a commercial motor vehicle with a suspended, revoked, canceled, or disqualified CDL
  • Causing a fatality through the negligent operation of a commercial motor vehicle (including but not limited to vehicular homicide or assault)
  • Committing 2 or more of the violations listed above, in separate incidents
  • Testing positive on the Department of Transportation test for drugs or alcohol
  • Driving a commercial vehicle while under an out-of-service order
  • Committing railroad-crossing violations while operating a commercial motor vehicle
  • Being reported as an imminent hazard by the Federal Motor Carrier Safety Administration
  • Committing 2 or more serious traffic offenses within 3 years, in separate incidents
  • Using any motor vehicle in the commission of a felony involving the manufacture, distribution, or dispensing of a controlled substance, or possession with intent to manufacture, distribute or dispense a controlled substance

DMV CDL Practice Tests

General Knowledge

The general knowledge test is the first of several tests that you will have to complete in order to get your CDL. The questions cover general information about commercial vehicles, driving, and vehicle inspections. The test has a total of 50 questions, and requires at least 40 correct answers to pass.

Air Brakes

You must have an Air brake endorsement on your driver's license to drive a vehicle equipped with an air brake system. This test will test your knowledge of the function, parts, and braking distance of air brakes. The test will consist of 25 questions, and at least 20 correct answers are needed to pass.


The combination endorsement allows you to drive a vehicle with a power unit and one trailer. This test will cover the "ins and outs" of operating articulated vehicles. The exam consists of 25 questions, and requires at least 20 correct to pass.

Hazardous Material

The Hazardous Material endorsement allows the driver to operate a vehicle containing items such as poisons, explosives, flammables, etc. You will also have to pass the TSA Hazardous Material Threat Assessment to get this endorsement. There are 30 questions, 24 correct required to pass.


The Tanker endorsement allows the driver to operate a vehicle weighing more than 26,000 pounds designed to transport any liquid or gaseous material within a tank that is permanently or temporarily attached to the vehicle. There are 20 questions, 16 correct required to pass.

Doubles / Triples

The Doubles/Triples endorsement is required for drivers to pull 2 trailers (doubles) or 3 trailers (triples) connected to a single power unit. There are 20 questions on this test, and 16 correct answers are required to pass.


Bus drivers must have a commercial driver's license with a passenger endorsement in order to operate a vehicle which seats 16 or more, including the driver. There are 20 questions on this test, and 16 correct answers are required to pass.

School Bus

School Bus Endorsement is required for any driver who operates a school bus. After the permit tests the training can be only completed by a local school district. There are 20 questions on this test, and 16 correct answers are required to pass.

Pre Trip Inspection

The Pre-Trip exam is an oral exam where you are expected to check the vehicle parts to insure it is safe for road use. The amount of parts you need to check increase with the size of the vehicle, and by type of vehicle.