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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.
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View All Plans| 90-100 | => | 67% |
| 80-89 | => | 33% |
| 70-79 | => | 0% |
| 60-69 | => | 0% |
| <60% | => | 0% |
Because most semi-trucks, tractor-trailers, and full-size buses in Utah depend on air brakes for safe operation, passing the Utah DMV CDL Air Brakes Knowledge Test is essential to gaining access to these jobs. Without a passing score, the “L” restriction stays on your CDL, legally preventing you from driving any CMV equipped with air brakes. That restriction limits your employability across major industries throughout the Beehive State. Failing the test results in a minimum one-day waiting period and a retest fee, costing you time and opportunity. Our Utah CDL Air Brakes Practice Tests are built to help you pass the official knowledge exam the first time so that you can join this class of much-needed qualified drivers.
Chief Educational Researcher, Driving‑Tests.org (ACES member)
Last verified for accuracy on
From the challenging terrain of the Wasatch Range and Rocky Mountains to the canyon corridors and high-wind desert stretches in the western portion of the state, commercial drivers rely on air brakes. The primary roadways, like I-15, I-70, I-80, and US-40, link rural and urban areas of the state. This infrastructure creates a lot of opportunities across major industries (like agriculture, education, energy, logistics, and manufacturing) and employers throughout the state.
Major employers include Chevron, Cummins, FedEx Freight, Greyhound, Northrop Grumman, Rocky Mountain Power, Suncrest Farms, UPS, Utah Produce Co., XPO, and the Utah Transit Authority. These employers rely on air brake-qualified drivers. Additionally, most full-size school buses are air brake-equipped, which means hundreds of jobs are available in school districts across the state. Keeping restriction “L” on your license closes the door to these driving roles.
The official Air Brakes written knowledge test is based on the state CDL manual and requires a minimum score of 80% to pass. Our practice tests simulate the state exam format, provide real-time feedback for every response, and reinforce critical concepts using AI-driven tools and an interactive CDL Manual. In fact, our series of practice tests features a Challenge Bank that remembers missed responses and reinforces that information until you’ve mastered it. Once you’ve aced this practice test, try another one on for size: https://driving-tests.org/utah/ut-cdl-air-brake-practice-test/.
You should consider adding valuable endorsements to your CDL, such as (N) Tanker, (H) Hazardous Materials, and (T) Doubles/Triples. Our Practice Tests help with this as well: https://driving-tests.org/utah/ut-cdl-hazmat-practice-test/. Also, to prepare for the official combination exam, check out our Combination Vehicles Practice Tests: https://driving-tests.org/utah/ut-cdl-combination-test/.
Driver’s Ed is - nobody wants to set foot inside the DMV. 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 UT 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 DMV.
