All your missed questions are saved
automatically for extra practice.
It's a practice test that's automatically made up of all your missed questions. Once you finish this test, you’ll be able to revisit your Challenge Bank™ to practice and sharpen your skills.
View All PlansAdding difficult questions to Challenge Bank™ is an exclusive Premium feature. Unlock access to 650+ exam-like questions, a Pass Guarantee, personalized study plans, and more.
View All Plans| 90-100 | => | 0% |
| 80-89 | => | 0% |
| 70-79 | => | 0% |
| 60-69 | => | 100% |
| <60% | => | 0% |
Air brakes are an essential safety feature on most semi-trucks and full-size buses, and you should become familiar with their operation to compete for the best driving opportunities. The presence of an “L” restriction on your Wyoming commercial driver’s license (CDL) prohibits you from driving air brake-equipped vehicles. Consider how this restriction will affect your ability to qualify for the great jobs offered by transportation providers, such as Bumpa and Sons Trucking and START Bus. Employers rely on their drivers to adhere to exemplary safety practices, and an extensive knowledge of air brakes is essential for them. Air brakes allow you to slow down or come to a complete stop while transporting heavy loads. Heavy snowfall, steep grades, and heavy traffic are examples of road conditions where proper training in air brake operations could prove invaluable.
Our Wyoming DOT CDL air brake “endorsement” practice test contains expert instruction to help you become an air brake-certified driver. Removing the “L” restriction from your CDL requires you to pass a skills test (including conducting an inspection of the air brake system) and an official Air Brakes Knowledge Test. You must answer at least 80% of the 25 questions on the official knowledge test to earn a passing score and prevent a one-day waiting period to retest.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
Using a format mirroring the official knowledge test, our Wyoming DOT CDL air brake “endorsement” practice test prepares you for the actual testing experience. The practice test provides 30 questions, similar to those on the official knowledge test, to assess your proficiency and identify the information you should study more. You can use the results to create a study plan and track your progress. It’s a recipe for success!
This Wyoming CDL air brake “endorsement” practice test presents you with authoritative information in a clear and concise manner. The practice test is based on the most recent Wyoming DOT CDL manual (Wyoming CDL Handbook 2025) and is up to date as of December 2025. If you get a question wrong, the practice test uses information taken directly from the CDL manual to thoroughly explain the correct answer.
Although commonly used, traditional study methods are less effective in helping you overcome your learning obstacles. Traditional study methods limit your training to memorizing the answers to the questions and offer no assistance in gaining a more in-depth understanding of air brakes. In contrast, the practice test is effective in its ability to eliminate your misunderstandings, apply its teachings to various driving scenarios, and increase your chances of passing the official knowledge test on your first attempt.
Gannett Peak requires advanced climbing expertise to reach its summit, but you can develop professional driving skills using the practice tests at https://driving-tests.org/wyoming/.
Driver’s Ed is - nobody wants to set foot inside the DOT. That’s why millions of learners trust us for simple, visual, effective prep.
We are an officially recognized FMCSA Entry-Level Driver Training provider and a proud partner to over 2,500 libraries. We work with safety organizations like GHSA and the National Safety Council to help create safer roads for everyone.
Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.
Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.
Go beyond the boring black-and-white manual. Our interactive handbook lets you read, listen with an MP3 audio version, or even chat with it to find the information you need, faster.
We build our practice questions from the current 2025 WY Driver Handbook and refine them using patterns recent test‑takers report.
Driver handbook • Knowledge‑test/permit overview • Fees & ID requirements • Office/appointment info
We mirror recurring themes (e.g., right‑of‑way traps, sign look‑alikes) and use similar distractors and wording styles.
We don’t collect or publish actual test items and we’re not affiliated with DOT.
