Washington General Knowledge CDL Prep Test (WA) 4

5 out of 5 (50 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Are you ready to tackle your fourth Washington CDL practice test? This is the ideal place to continue your preparation. This particular general knowledge prep test consists of 20 DOL questions, and you need to score at least 16 correct answers to pass. Every attempt you make will present the same set of questions, allowing you to focus on mastering the material. One of the major benefits of using this Washington general knowledge CDL prep test is the customizable nature of your study sessions. Whether you find certain topics more challenging or simply want to ensure you're thoroughly prepared, you can concentrate on those areas and retake the DOL practice test multiple times. This flexibility allows you to practice at your convenience and see improvements over time. While this Washington DMV CDL practice test is an excellent supplementary resource, it's important to remember that it does not replace traditional drivers education and ELDT programs. In states like Washington, completing a state-certified Entry Level Driver Training course is a mandatory requirement for obtaining a commercial driver's license. This DMV practice test should be used alongside these courses to ensure a comprehensive understanding of the material. It helps identify and reinforce areas that might not have been fully covered in the driver ed course, giving you a well-rounded preparation for the real Washington DOL knowledge test. The questions you'll encounter on this Washington CDL practice test are designed to closely mimic those on the actual DMV knowledge test, both in format and content. This familiarity helps build your confidence and ensures that you know what to expect when taking the real written permit test. By continuously practicing with this Washington general knowledge CDL prep test, you can identify areas for improvement and increase your chances of passing the actual DMV permit test in 2026 on your first try. So, take advantage of these DMV practice tests to enhance your learning and boost your confidence as you prepare for your CDL test!
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Sample Washington CDL Test Questions - General Knowledge

Question 1

What is the minimum legal tread depth for a front tire on a bus, truck, or truck tractor?

  1. A 2/32 inch
  2. B 4/32 inch
  3. C 6/32 inch
  4. D 1/4 inch

Correct answer: B – 4/32 inch

Federal tire rules require at least 4/32 inch of tread depth on the front wheels of a bus, truck, or truck tractor. The measurement is taken at any point in a major tread groove, but not at tie bars, humps, or fillets. Most other tire positions require at least 2/32 inch.

Source: Washington State Commercial Driver Guide — § 2.1.3, “Tire Problems”, 49 CFR § 393.75(b), (c) — Tires

Question 2

How should a driver test whether the vehicle's parking brake will hold?

  1. A Leave the transmission in neutral while parked
  2. B Place the vehicle in low gear and gently pull forward against the applied brake
  3. C Apply the brake while descending a hill
  4. D Apply the brake while traveling at least 30 mph

Correct answer: B – Place the vehicle in low gear and gently pull forward against the applied brake

Washington's vehicle-inspection procedure calls for setting the parking brake, selecting a low gear, and gently pulling forward to verify that the brake holds the vehicle. On a combination vehicle, the power-unit and trailer parking brakes are tested separately as applicable. A parking-brake holding test should not be performed at highway speed or while descending a hill.

Source: Washington State Commercial Driver Guide — § 2.1.5, “7-Step Inspection Method—Test Parking Brake(s)”

Question 3

Hazardous material is leaking from your commercial vehicle. What should you do?

  1. A Park safely, moving the vehicle only as safety requires
  2. B Secure the area and keep people away
  3. C Remain at the scene and call for help or send someone else
  4. D All of these actions

Correct answer: D – All of these actions

The Washington guide instructs drivers to park, secure the area, remain at the scene, and call for help or send someone. Do not continue driving merely to find a telephone or truck stop. Move the vehicle only when safety requires it and the movement will not endanger anyone. Stay away from the material and keep others at a safe distance.

Source: Washington State Commercial Driver Guide — § 9.7.2, “Crashes/Incidents”

Question 4

Which vehicle-visibility devices must be kept clean and operating properly?

  1. A Reflectors and marker lights
  2. B Clearance lights and taillights
  3. C Identification lights
  4. D All of these devices

Correct answer: D – All of these devices

Reflectors, marker lights, clearance lights, taillights, and identification lights all help other road users detect and judge a commercial vehicle. Dirt or equipment failure can make the vehicle harder to see, especially at night or during bad weather. Inspect these devices regularly and clean them as necessary.

Source: Washington State Commercial Driver Guide — § 2.5.2, “Communicating Your Presence—Other Lights”

Question 5

How should you respond when another motorist confronts you with aggressive driving?

  1. A Make eye contact to show that you noticed the behavior
  2. B Copy the motorist's actions
  3. C Accelerate and defend your position in the lane
  4. D Avoid reacting and move out of the motorist's way when possible

Correct answer: D – Avoid reacting and move out of the motorist's way when possible

The Washington guide directs drivers to make every reasonable effort to get out of an aggressive motorist's way. Do not challenge the person by accelerating or attempting to hold your position. Avoid eye contact, gestures, and other reactions that could escalate the situation. Report the driver to authorities when that can be done safely.

Source: Washington State Commercial Driver Guide — § 2.10.3, “What You Should Do When Confronted by an Aggressive Driver”

Question 6

Which description best defines a driving hazard?

  1. A Any road condition or road user that presents a possible danger
  2. B Only an object physically blocking the travel lane
  3. C Only a damaged or poorly maintained roadway
  4. D Any condition that has already caused a collision

Correct answer: A – Any road condition or road user that presents a possible danger

A hazard is any road condition or road user that could create danger. It does not have to be an object blocking the lane or an emergency that has already developed. Recognizing hazards early gives a driver more time to plan and take safe action before the situation becomes urgent.

Source: Washington State Commercial Driver Guide — § 2.8.1, “What Is a Hazard?”

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