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  • Updated for December 2024
  • Based on 2024 WA commercial driver's license manual

Free WA CDL Pre-Trip Inspection Practice Exam 2024

In Washington, major cities like Seattle, Tacoma, and Spokane are hubs of economic activity. The state has a well-maintained network of highways, such as Interstate 5, Interstate 90, and Interstate 405, which are often frequented by commercial vehicles. As a commercial driver, it is your responsibility to ensure the safety of your cargo or passengers, and it all starts way before you release the handbrake at the beginning of your shift.

The pre-trip inspection is a procedure where drivers thoroughly check their vehicle to ensure it’s safe enough for the upcoming trip. This inspection generally covers a walkaround, during which you’ll check the brakes, tires, lights and any fluid leaks. An interior check of all the gauges and indicators, seatbelts and emergency equipment should also be performed. To make it easier to remember, we recommend you learn this walkaround procedure and perform it the same way each time.

To obtain a Commercial Driver’s License (CDL), you must pass a general knowledge test and a skills test. We’ll help you with the pre-trip inspection part of the knowledge test, but you’ll have to perform this inspection yourself during the skills test.

Aspiring commercial drivers should already be familiar with the official 2024 CDL manual (Washington CDL Handbook 2024). They also know how difficult it is to study. One can spend countless hours without finding the answers to their specific questions or memorizing them successfully. Our CDL Pre-Trip practice tests are specific to the state of Washington. They can give you a significant boost in your learning journey, offering you an advantage over those who skip such opportunities.

Each consisting of 20 questions on the pre-trip inspection, these practice tests are designed to help you understand what this inspection is about. Take your time and practice as long as you want. You have unlimited attempts and the various features will make this experience easier for you. For ease of use, we have introduced a voiceover function that reads the question and the answer choices aloud. Additionally, by pressing the “SHIFT + ?” key combination, you will receive a complete list of keys you can use to take these tests by only using your keyboard.

Commercial Driver's License
  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
  • Triple-checked for accuracy

What you need to know

6 min to complete
Available in EN and ES
Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.
Ensuring the accuracy and quality of our program is paramount. Learn more about our rigorous standards in our Commitment to Accuracy article.

What to expect on the actual WA DOL exam

20

questions

16

correct answers to pass

80%

passing score

List of questions (classic view)

  1. What structure supporting the fifth wheel skid plate should be checked for cracks or breaks?
  2. You pump the pedal three times and hold it down for five seconds, making sure that the pedal does not move. What are you inspecting?
  3. What transmits power from the transmission to the drive axle?
  4. What carries air or hydraulic fluid to the wheel brake assembly?
  5. ________ are gas or hydraulic devices that cushion the vehicle's ride and stabilize the vehicle.
  6. What is the sliding mechanism and locking device for tandem axles on trailers?
  7. What do you inspect to make sure that all are present and show no signs of looseness such as rust trails or shiny threads?
  8. What should you check to be sure it is solid, clear of objects, and securely bolted to the tractor frame?
  9. What maintains air pressure in the air brake system?
  10. Which tires should have a minimum tread depth of 4/32 inch?
  11. Which of the following can disengage the engine from the drivetrain?
  12. What transforms steering column action into wheel action?
  13. Make sure that the _________ are not cut, chafed, spliced, or worn, and not tangled, pinched, or dragged against tractor parts.
  14. You are looking for puddles on the ground and dripping fluids on the underside of the engine and transmission. What are you checking for?
  15. What should be fully engaged with no loose or missing pins in the slide mechanism of the sliding fifth wheel?
  16. To improve visibility during severe or stormy weather, __________ must be secure, undamaged, and operating smoothly and correctly.
  17. _________ should be clean with no dirt, illegal stickers, obstructions, or damage.
  18. _________ are the brackets, bolts, or bushings that are used to attach the spring or air bag to the axle and vehicle frame.
  19. If the wheel has a sight glass, check that the oil level is adequate. Otherwise, look for leaks around the
  20. What releases the fifth wheel locking jaws so the trailer can be coupled?
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