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View All PlansFailure to pass the New Hampshire DMV CDL Air Brakes Knowledge Test means that your CDL will include the restriction “L,” preventing you from operating commercial motor vehicles (CMVs) with air brakes. This “L” restriction will negatively affect your job prospects in this market. Failing the air brakes test in New Hampshire results in a one-day waiting period and a fee should you decide to retake the test. Our New Hampshire DMV CDL Air Brakes Practice Tests are the perfect tool for passing your knowledge exam on the first attempt.
Navigating New Hampshire’s diverse terrain, including the steep grades of Mount Washington and the winding roads of the Kancamagus Highway, requires a reliable air brake system. This need for air brakes is only compounded by winter ice and snow. Key transportation routes in New Hampshire include I-93 (a major north-south route connecting Boston, NH’s Lakes Region, and the White Mountains), US-4 (an important east-west highway linking rural to urban areas), and US-112 (Kancamagus Highway) (a mountain road with steep grades and sharp curves). Most semi-trucks, tractor-trailers, and commercial buses rely on air brakes for safe travel. Hence, removing the air brake restriction from your CDL is vital for expanded job opportunities.
The Granite State relies on drivers with the air brake qualification in key industries, including forestry, manufacturing, and tourism. Companies requiring the air brake qualification include Land Air Express (Bow) and L.A. Limousine (Manchester) in the trucking industry and Concord Coach Lines (Concord) and Dartmouth Coach (Lebanon) in the charter bus sector. Timberwolf Logging (Littleton), BW Timber Harvesting (North Haverhill), and Lumberjack Logging Company, LLC (Goffstown) are major logging industry companies requiring air brake-qualified drivers. Furthermore, New Hampshire’s school districts use air brakes on their full-size buses, employing hundreds of air brake-qualified drivers. The “L” restriction makes these jobs unattainable.
The written Air Brakes knowledge test features multiple-choice questions based on the state’s CDL manual (New Hampshire CDL Handbook 2025) and requires a minimum passing score of 80%. On our practice tests, you’ll receive instant feedback on all your responses, helping you learn faster and ensuring you pass the knowledge test. As a bonus, the information you learn will also help you prepare to pass your skills test!
Our CDL Air Brakes Practice Tests cover everything needed and mimic the official DMV Air Brakes Knowledge Test.
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Last verified for accuracy: November 2025 (reviewed weekly)
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