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Operating commercial motor vehicles (CMVs) with air brakes requires a specialized skill set. Our Hawaii DMV CDL Air Brakes Practice Tests are designed to help you pass your knowledge exam on the first attempt. If you don’t pass, your CDL will include the restriction “L,” preventing you from operating CMVs with air brakes. In Hawaii, where there are mountainous areas (Maui and the Big Island), winding roads (Hana Highway), and challenging tropical weather, the need for air brakes and drivers qualified to use them is critical. There are major coastal freight routes along the Queen Ka’ahumanu Highway (Big Island) as well as steep volcanic climbs on the Haleakala Highway (Maui) that require precise braking, not to mention the traffic congestion in tourism-heavy areas along the H-1, H-2, and H-3 freeways on Oahu. As most semi-trucks and tractor-trailers rely on air brakes, this qualification is essential for a driver’s overall job market success.
Chief Educational Researcher, Driving‑Tests.org (ACES member)
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Industries across the Aloha State rely on drivers with the air brake qualification. Major companies requiring the air brakes qualification include Hawaiian Cement and Grace Pacific LLC. in the construction industry. The freight sector includes companies like Young Brothers and UPS, which hire a significant number of drivers with the air brakes qualification. So do charter bus companies like Roberts Hawaii and Polynesian Adventure Tours, public transit options offered by TheBus (Oahu), and school districts operating hundreds of Department of Education school buses. Passing the test to have the “L” restriction removed makes these jobs attainable.
Our practice tests help you pass your air brake knowledge test; however, the information you learn will also be useful as you practice to pass your skills test. The hands-on skills test includes inspecting components, testing for air pressure and leaks, and operating a vehicle equipped with air brakes. The written Air Brakes knowledge test features multiple-choice questions based on the official Hawaii CDL manual (Hawaii CDL Handbook 2025) and requires a score of at least 80% to pass.
Our CDL Air Brakes Practice Tests are designed to closely align with the official DMV knowledge test, mimicking the content and format you’ll encounter. Additionally, our practice test questions and answers provide responses in real time, a scientifically-backed approach for enhancing retention. You can learn quickly and be confident of passing your official exam.
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 HI 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.
