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View All PlansAir Brakes are standard equipment in nearly all tractor-trailers, full-size buses, and heavy trucks, so passing the District of Columbia DMV CDL Air Brakes Test is a no-brainer if you plan to sustain a career in the commercial driving industry. Without the air brakes qualification, your CDL will include the “L” restriction, prohibiting you from driving any CMV equipped with air brakes. In the Nation’s Capital, where the roads are busy, the intersections are complex, and the traffic is intense, being qualified on air brakes is a must. Not passing the Air Brakes Test will severely limit your job opportunities.
In order to remove this restriction, you must pass the District of Columbia CDL Air Brakes Test, which consists of two main parts. The Knowledge Test is a multiple-choice exam (80% required passing score) covering the components of air brake systems, proper inspection methods, and safe operation procedures as outlined in Section 5 of the District of Columbia CDL Manual. The Skills Test is a hands-on vehicle inspection and operation evaluation, where you’ll be asked to identify and test key air brake components, perform a leak test, and demonstrate safe vehicle control while being supervised by an official examiner.
M.S., Chief Educational Researcher (ACES member)
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Our District of Columbia CDL Air Brakes Practice Tests simulate the official knowledge exam and provide instant feedback for all responses. Our practice test series includes a Challenge Bank of questions that remembers any you miss and, after some coaching on the material, asks you again to ensure you’ve mastered the material. Our series also features an interactive CDL handbook and AI-powered feedback. Aced this practice test? Try another here: https://driving-tests.org/district-columbia/dc-cdl-air-brake-practice-test/. Once you consistently score well, simply schedule your official exam with the District of Columbia DMV, pay the testing fee, and pass with flying colors.
You should also check out our District of Columbia Endorsement Practice Tests. Each endorsement you earn for your CDL adds marketability and opens the door to more jobs. Try one of our endorsement practice tests here: https://driving-tests.org/district-columbia/dc-cdl-hazmat-practice-test/. You should also consider obtaining a Class A CDL, which permits you to operate tractor-trailers and other combination vehicles, opening a huge arena of potentially higher-paying jobs! Try one of our practice tests here: https://driving-tests.org/district-columbia/dc-cdl-combination-test/.
Major employers like the Washington Metropolitan Area Transit Authority (WMATA), charter companies like DC Trails or Gray Line DC, and delivery fleets such as Amazon, FedEx, and UPS all use air brakes and require drivers with this qualification. Set yourself apart from some of the competition with your air brakes qualification, and then set yourself apart from A LOT of the competition with more endorsements and your Class A License!
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 2026 DC 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.
