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Securing a CDL without the air brake restriction is essential in Oklahoma if you want greater access to commercial driving opportunities. Failing the Oklahoma DPS Air Brakes Knowledge Test (or passing the Skills Test in a vehicle that is not air brake-equipped) results in the “L” restriction, which prohibits you from operating vehicles equipped with air brakes. This has a huge effect on most trucking, freight, and transportation roles, as the use of air brakes is prevalent in most commercial motor vehicles (CMVs). You’ll be required to wait one day and pay a retest fee if you fail, so passing on the first attempt is financially better and avoids unnecessary delays. Our Oklahoma CDL Air Brakes Practice Tests help ensure first-time success and mimic the real exam format. Studying within the format of the official test creates comfort with the exam prior to even walking into the testing center.
Chief Educational Researcher, Driving‑Tests.org (ACES member)
Last verified for accuracy on
The state’s high winds on the plains and steep hills in the Arbuckle and Wichita Mountains make precise braking a necessity. Essential interstates like I-40, I-35, and I-44, as well as U.S. Route 69, form the road infrastructure where drivers rely on air brake systems to manage vehicles, especially in inclement weather. Major sectors in the Sooner State that rely on air brake-qualified drivers include agriculture, charter transportation, education, energy, and manufacturing. Major employers, such as Chesapeake Energy, Devon Energy, Ditch Witch, K&J, Kimberly-Clark, Oklahoma Ag Transport, ONEOK, Village Travel, Jefferson Lines, and most school districts, employ vehicles equipped with air brakes.
Our CDL Air Brakes Practice Tests cover all necessary material presented in the most up-to-date Oklahoma Commercial Driver License Manual, including system components, proper inspection procedures, dual air systems, and emergency braking. The official written exam consists of multiple-choice questions and requires an 80% passing score. Our Practice Tests employ a scientifically proven AI-driven learning approach that corrects mistakes as you go. We also provide an interactive CDL Manual and a Challenge Bank that remembers missed questions and asks them again until you answer them correctly. Once you’ve aced this practice test, try another one here: https://driving-tests.org/oklahoma/ok-cdl-air-brake-practice-test/.
Consider adding endorsements such as T – Doubles/Triples, N – Tank Vehicles, H – Hazardous Materials, and X – Tank and Hazmat Combined. Check out our series of Endorsement Practice Tests to enhance your marketability: https://driving-tests.org/oklahoma/ok-cdl-hazmat-practice-test/. Also, why not continue your studies and prepare for the Combination Vehicles Knowledge Test, one of the requirements for a Class A License: https://driving-tests.org/oklahoma/ok-cdl-combination-test/.
Driver’s Ed is - nobody wants to set foot inside the DPS. 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 OK 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 DPS.
