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An “L” restriction on your New Hampshire Commercial Driver’s License (CDL) disqualifies you from operating vehicles equipped with air brakes. Most semi-trucks, tractor-trailers, and full-size buses are equipped with air brakes. An air brake restriction presents a significant hurdle to securing driving opportunities with private and public transportation service providers, such as Manchester Motor Freight and Concord Area Transit. Air brakes are necessary to help regulate your speed and react to changing road conditions while transporting heavily weighted loads. Drivers rely on air brakes to safely navigate sharp curves and come to a complete stop in heavily congested traffic. An extensive knowledge of air brake operations keeps you safe as you manage these conditions. With adequate training, you can learn to competently operate air brakes, access more driving opportunities, and preserve your safety.
Our New Hampshire DMV CDL air brake “endorsement” practice test uses a groundbreaking study technique to teach you about air brake systems. Removing the “L” restriction is a two-part process that requires you to pass a skills test (including inspecting the air brakes) and an official knowledge test. The practice test is designed to address your specific learning obstacles. Using 30 questions, the practice test assesses your current proficiency and directs you to the information you should study more. You must answer at least 80% of the 25 questions on the official knowledge test to pass, and the practice test provides an effective strategy for achieving this score.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
This New Hampshire DMV CDL air brake “endorsement” practice test outperforms traditional study methods in providing comprehensive instruction of air brake operations. While traditional study methods limit you to learning surface knowledge, the practice test uses an approach designed to rapidly expand your understanding of air brakes to meet the challenges of the official knowledge test. The practice test is based on the most recent New Hampshire DMV CDL manual (New Hampshire CDL Handbook 2025) and is up to date as of December 2025. If you submit an incorrect answer, the practice test will provide a detailed explanation of the correct one. Traditional study methods omit this crucial step in the learning process and solely rely on your ability to memorize the answers to the questions. Their failure to get you the information to correct your wrong answers undermines your ability to completely develop your skills. The practice test makes this information readily available and shows you how to apply it to various driving scenarios. You will more effectively absorb the information and use it in your driving practices. The practice test enhances your skills and boosts your confidence to pass the official knowledge test on your first attempt.
The poor weather conditions in the Presidential Range are ideal for mountaineer training, but you can learn impeccable driving skills using the practice test at https://driving-tests.org/new-hampshire/.
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 NH 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.
