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 | => | 18% |
| 80-89 | => | 34% |
| 70-79 | => | 23% |
| 60-69 | => | 16% |
| <60% | => | 10% |
You’ve come to the right place for removing the “L” restriction from your CDL. Passing the North Carolina DMV CDL Air Brakes Knowledge Test and the Skills Test in an air brake-equipped vehicle is essential to that process. The “L” restriction prohibits you from operating any commercial motor vehicle equipped with air brakes and creates a serious impediment to accessing a wide range of job opportunities. Removing that restriction is a strong way to add marketability to your CDL. The Air Brakes Knowledge Test includes multiple-choice questions based on the official CDL Manual. You must score at least 80% to pass. If you fail either test (or take the Skills Test in a vehicle not equipped with air brakes), the restriction will remain on your CDL.
Additionally, in North Carolina, if you fail either test, you must wait one day before retesting and pay an added fee. Our North Carolina CDL Air Brakes Practice Tests prepare you to pass on the first try with a variety of study tools that not only grant you familiarity with the exact format of the official test but also contain AI-driven feedback, an interactive CDL Manual, and a Challenge Bank of questions that remembers what you get wrong. It then presents missed questions again and again until you answer them correctly. These proven methods speed learning and increase overall retention. Our practice tests eliminate any unnecessary fluff found in other study guides and make certain you work with tested material, including air brake components, dual-air systems, proper brake inspection, and safe braking techniques. This approach saves you time and mental bandwidth. Once you’ve mastered this practice test, try another from our series: https://driving-tests.org/north-carolina/nc-cdl-air-brake-practice-test/.
From the state’s steep grades to the rolling hills and coastal plains, the Tar Heel State demands dependable braking systems. Air brakes are especially critical on I-40, I-85, I-95, and US-64. The state’s often-severe weather (summer thunderstorms, heavy rains, black ice, and winter snow) further increases the need for properly trained, air brake-qualified drivers.
North Carolina’s economy relies heavily on industries where air-brake-equipped CMVs are standard, including agriculture, energy, freight, logistics, passenger transportation, and manufacturing. Major employers dependent on air brake-qualified drivers include Carolina Biological Supply, Carolina Trailways, Duke Energy, Greyhound Lines, FedEx Freight, Smithfield Foods, Tyson Foods, Volvo Trucks, XPO Logistics, and all North Carolina public school districts.
Consider adding valuable endorsements to your CDL. Our Practice Tests can help: https://driving-tests.org/north-carolina/nc-cdl-hazmat-practice-test/. Also, check out our Combination Vehicles Practice Tests to prepare for the official combination exam: https://driving-tests.org/north-carolina/nc-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 NC 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.
