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Failure to pass the Mississippi DMV CDL Air Brakes Knowledge Test will prevent you from operating commercial motor vehicles (CMVs) with air brakes because restriction “L” will remain on your CDL. The “L” restriction can significantly damage your job prospects in commercial driving, as air brakes are commonly employed across the transportation sector. Failing the air brakes test in Mississippi results in a one-day waiting period and a fee should you decide to retake the test. Our Mississippi DMV CDL Air Brakes Practice Tests will help you pass your knowledge exam on the first attempt.
Chief Educational Researcher, Driving‑Tests.org (ACES member)
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Because most semi-trucks, tractor-trailers, and commercial buses rely on air brakes for safe navigation, removing the air brake restriction from your CDL is vital for expanded job opportunities. Key transportation routes within Mississippi include I-20 (an east-west corridor between Louisiana and Alabama), I-55 (a major north-south route connecting with Arkansas and Louisiana), I-10 (connecting Mississippi to New Orleans and the Gulf Coast), and US-49 (running from the Delta region to southern Mississippi). Mississippi features both flat terrain and the Appalachian foothills. Frequent heavy rainfall and occasional flooding impact road conditions, making air brakes essential for safe vehicle control. These hazards are compounded by winter ice and frost.
The Magnolia State relies on air brakes in key industries, including agriculture, energy, manufacturing, and logistics. CDL drivers with air brake qualifications are in demand in companies like Sanderson Farms and Cal-Maine Foods in the agriculture sector and Entergy Mississippi in the energy sector. Peavey Electronics (Meridian) and Nissan (Canton) require air brake-qualified drivers in the manufacturing industry and FedEx Freight and XPO Logistics in the logistics and freight services. The charter bus industry includes air brake-equipped buses at Greyhound Lines and Shoreline Tours. Full-size school buses used throughout the state typically have air brakes too. The “L” restriction closes access to these jobs.
The information you learn from practicing with our CDL Air Brakes Practice Tests will fully prepare you for the official DMV Air Brakes Knowledge Test and help you pass your skills test. The knowledge test features multiple-choice questions based on the state’s CDL manual (Mississippi CDL Handbook 2025) and requires a minimum passing score of 80%.
Our tests mimic the official knowledge test, and you’ll receive immediate feedback on all your Practice Test responses. This approach speeds learning and ensures you pass the knowledge 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 MS 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.
