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Planning to drive commercial motor vehicles (CMVs) equipped with air brakes? Passing the CDL Air Brakes test is essential for operating large commercial motor vehicles (CMVs) in Delaware. Without it, your CDL will include an “L” restriction banning you from driving vehicles equipped with air brakes, which are standard equipment on most semi-trucks and trailers. Our CDL Air Brakes Practice Tests are designed to prepare and help you confidently pass your exam on the first attempt.
Delaware’s coastal and wetland areas, particularly along the Delaware Bay and in areas like Cape Henlopen State Park, create situations where truck drivers face wet, slick, and flooded roads, making air brakes proficiency essential. The Delaware Memorial Bridge and the Chesapeake & Delaware Canal Bridge feature inclined grades that require air brake management for safe travel. Congested areas like Wilmington and Dover have heavy traffic where air brake qualifications are needed for precise stopping.
Chief Educational Researcher, Driving‑Tests.org (ACES member)
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Industries across the First State rely on drivers with the air brake qualification. These include agriculture, manufacturing, financial services, tourism, and transportation and logistics. Key companies in the state, like Safer Trucking (Wilmington) and Delaware Motor Transport (Dover), require air-brake-qualified drivers for safe handling of freight. Charter bus companies like Delaware Express (Wilmington) and Beach Bus (Rehoboth Beach) require air brake qualifications. Most, if not all, school districts use air-brake-equipped school buses. Companies like Delaware Constructors and Brandywine Construction often require air-brake-qualified drivers to transport large equipment across the state. Simply put, the “L” restriction makes operating CMVs equipped with air brakes illegal, thus eliminating the above job prospects.
The official two-part DMV test covers the parts of an air brake system, effective operation, and air-brake inspection procedures. The skills test requires you to physically inspect an air brake system, identify its components, and operate a vehicle equipped with air brakes. This test includes checking air pressure, testing the brakes for leaks, and more. The multiple-choice written test requires a score of at least 80% to pass and features questions directly from material found in the state’s CDL manual.
Our CDL Air Brakes Practice Tests cover all that is required for the official DMV knowledge test and mimic the content and format you will face on the test. Our practice test questions and answers provide responses in real time so you can learn quickly and confidently pass 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 DE 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.
