Back to Program Home
/
 
 
 
 
 
Ask DMV Genie AI
new
    Close
    MT commercial driver's license

    Free Montana CDL Air Brakes Test 2025

    • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
    • Based on 2025 MT commercial driver's license manual
    • Updated for March 2025

    A CDL without an air brake restriction is essential for maximizing your job prospects, since most semi-trucks and tractor-trailers rely on air brakes. Failing to pass the Montana MVD CDL Air Brakes Knowledge Test results in an “L” restriction on your CDL, preventing you from operating vehicles equipped with air brakes. Failing the test also results in a one-day waiting period and a retest fee. Our Montana MVD CDL Air Brakes Practice Tests are designed to help you pass your knowledge exam on the first attempt.

    From Montana’s rugged mountains to the frequent high winds and flooding on its plains, the terrain requires air brake-qualified drivers for heavy rigs. The deep snow and ice in winter compounds this need for a reliable air brake system. Major transportation routes in Montana include I-90 (a major freight corridor crossing the mountains), I-15 (a north-south route with steep inclines), I-94 (an eastern highway crucial for freight). The “L” restriction severely limits your driving options on these highways and the many jobs provided.

    Industries across the Big Sky State that rely on drivers with the air brake qualification include agriculture, energy, mining, and tourism. Major companies requiring air brakes include CHS Inc. and RMA Energy in the agriculture sector and Montana Resources and ExxonMobil in the mining and energy sectors. XPO Logistics and UPS are major players in the freight and logistics industry that require air brake-qualified drivers. So do Greyhound Lines and Total Transportation in the tourism industry. Finally, school districts across the state use full-size air brake-equipped school buses, employing hundreds of qualified drivers. The “L” restriction makes operating CMVs equipped with air brakes illegal, eliminating the above-listed employment options.

    The written Air Brakes knowledge test features multiple-choice questions based on the state’s CDL manual (Montana CDL Handbook 2025) and requires a minimum passing score of 80%. Our CDL Air Brakes Practice Tests cover all essential knowledge for the official MVD Air Brakes knowledge test. The information you learn will also help prepare you for your skills test, which includes inspecting components, testing for air pressure and leaks, and operating air brake-equipped vehicles.

    Our Practice Tests are designed to resemble what you will face on the official test and offer real-time feedback on all responses. This scientifically proven approach improves material retention and ensures you’re prepared to pass the test.

    4.86 out of 5 • 7 votes.
    9 min to complete
    Available in EN and ES
    Pass the first time,
    guaranteed with Premium

    All 650 exam-like questions
    specific to your state

    Interactive learning with
    AI personal tutor

    Unique 360° Virtual Road
    Simulations

    Get your money back if you
    don’t pass

    What to expect on the actual MT MVD exam

    25

    questions

    20

    correct answers to pass

    80%

    passing score

    More MT MVD Written Exam Resources

    1. MT CDL Air Brakes Test (you are here)
    Are you in another state?
    Pass the first time with Premium
    You test results are ready

    Pass Your CDL Exams the First Time – Guaranteed

    You’re moments from your results. Before viewing them, see how you can get your ELDT certificate and pass — at a fraction of what schools charge.

    • 1,500 Real Exam‐Like Questions Covers every endorsement plus a Pass Guarantee.
    • FMCSA‐Approved ELDT Official certification, instant completion reporting.
    • 99.06% Pass Rate vs. 49% Avg Trusted by over 1.15 million drivers to succeed first time.
    Learn More & Guarantee My Pass
    Opens in a new tab — your results are saved.