All your missed questions are saved
automatically for extra practice.
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.
View All PlansAdding difficult questions to Challenge Bank™ is an exclusive Premium feature. Unlock access to 650+ exam-like questions, a Pass Guarantee, personalized study plans, and more.
View All Plans| 90-100 | => | 23% |
| 80-89 | => | 58% |
| 70-79 | => | 15% |
| 60-69 | => | 4% |
| <60% | => | 0% |
To operate commercial motor vehicles (CMVs) equipped with air brakes in Maryland, you must pass the Maryland MVA CDL Air Brakes Knowledge Test and the Skills Test in an air brake-equipped vehicle. The tests are based on the MVA Commercial Driver’s License Manual, which is filled with information, new terms, rules and regulations, procedures, labels, protocols, and much more. This daunting amount of information can quickly overwhelm anyone preparing to be tested on the material. But you must pass these tests in order to remove the “L” restriction from your CDL, which prohibits you from driving any vehicles with air brakes.
The official Air Brakes Knowledge Test consists of 25 multiple-choice questions, and a minimum score of 80% is required to pass. If you fail, you must wait at least one business day before retesting, and a retest fee may apply. With so much material to learn and potential delays and additional fees, you’ve certainly come to the right place to prepare with our series of Air Brakes Practice Tests!
Our Free Maryland CDL Air Brakes Practice Tests mirror the official exam format. Each response includes immediate feedback, AI-driven explanations, and hints as needed to reinforce retention. Our practice tests also feature a Challenge Bank that recalls any missed questions until you have proven mastery of all the test material. Once you’ve mastered this practice test, try another here: https://driving-tests.org/maryland/md-cdl-air-brake-practice-test/.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
Maryland’s coastal plains highways, urban interstates, and Appalachian routes are part of an infrastructure designed for your success. From the Port of Baltimore (one of the busiest shipping hubs on the East Coast) to major roadways like I-95, I-70, and I-83, air brake-qualified drivers are in constant demand across the state. Major employers that rely on air brake-qualified drivers include Amazon distribution centers, federal contractors, and regional logistics carriers, as well as employers tied to the state’s major industries, such as agriculture, biotechnology, and manufacturing.
Once you’ve earned your air brakes qualification, consider additional endorsements to expand your career options, including N – Tanker, H – Hazardous Materials, and T – Doubles/Triples. We have Endorsement Practice Tests to help: https://driving-tests.org/maryland/md-cdl-hazmat-practice-test/. Also, since most combination vehicles use air brakes (and you’re taking care of that test now), consider preparing for the CDL Combination Vehicles Knowledge Test, which is one of the key steps toward earning a Class A License, a major career boost once obtained! Check out one of our Combination Vehicles Practice Tests here: https://driving-tests.org/maryland/md-cdl-combination-test/.
Driver’s Ed is - nobody wants to set foot inside the MVA. 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 MD 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 MVA.
