- Updated for March 2025
- Based on 2025 NE commercial driver's license manual
Free Nebraska CDL Air Brakes Test 2025
Passing the Nebraska DMV CDL Air Brakes Knowledge Test is essential for maximizing your job opportunities and avoiding unnecessary restrictions on your license, waiting periods, and retest fees. Failure to pass the Nebraska DMV CDL Air Brakes Knowledge Test means your CDL will include the restriction “L,” prohibiting you from operating commercial motor vehicles (CMVs) with air brakes. That restriction will close the door to a long list of job opportunities and significantly impact your marketability in this market. Our Nebraska DMV CDL Air Brakes Practice Tests prepare you for passing your knowledge exam on the first attempt.
The isolated stretches of road in Nebraska require a reliable braking system to avoid servicing needs in transit. Additionally, the Missouri River Valley features steep grades and sharp curves that demand air brake-qualified drivers to safely navigate, especially in winter snows and ice. Key transportation routes include I-80 (running east-west through Nebraska, connecting Omaha, Lincoln, and other major hubs), I-29 (running north-south and serving neighboring states), US-6 and US-34 (connecting rural agricultural areas with urban distribution centers). Because most semi-trucks, tractor-trailers, and commercial buses rely on air brakes for safe navigation, mastering air brakes and removing the air brake restriction from your CDL are vital for expanded job opportunities.
The Cornhusker State relies on drivers with the air brake qualification in key industries, including agriculture, food processing, transportation, and renewable energy. Major companies requiring the air brake qualification include Crete Carrier Corporation (Lincoln) and Werner Enterprises (Omaha) in the trucking industry and Arrow State Lines (Omaha) and K & D Transportation (Lincoln) in the charter bus industry. The agriculture and grain hauling sector includes NSG Logistics (Gothenburg), Rollin’ Coal Trucking (grain and fertilizer), and H&M Trucking (Omaha), which rely on air brake-qualified drivers. Many school districts in Nebraska use air brake-equipped buses, requiring drivers to hold this qualification.
The written Air Brakes knowledge test features multiple-choice questions based on the state’s CDL manual (Nebraska CDL Handbook 2025) and requires a score of at least 80% to pass. Our CDL Air Brakes Practice Tests cover everything needed for the official DMV Air Brakes Knowledge Test.
With instant feedback on all our Practice Test responses and practice tests that mimic the official knowledge test, you’ll learn faster and pass the knowledge test on your first attempt!
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Triple-checked for accuracy
What you need to know
What to expect on the actual NE DMV exam
questions
correct answers to pass
passing score
List of questions (classic view)
- If the air tanks are not drained,
- Which of the following will be true about your brake function if your anti-lock braking system (ABS) fails?
- Which of the following can cause brakes to fade or fail?
- Under which conditions are front wheel brakes good?
- Which of the following is NOT part of the air brake system?
- Which of the following should you do before leaving your vehicle unattended?
- After the initial drop, the maximum acceptable leakage rates per minute are
- How would you check your truck's slack adjusters?
- When should you use the parking brake?
- Slack adjusters are
- Which of the following is NOT part of the braking process when driving a tractor-trailer combination vehicle with an anti-lock braking system (ABS)?
- Why must you pass a knowledge test on air brakes?
- What is the best way to test your vehicle's low air pressure warning signal?
- The purpose of a supply pressure gauge is
- The tractor protection valve
- Which of the following is NOT part of the drum brake?
- An anti-lock braking system (ABS)
- When should you drain your air tanks?
- Which vehicles must have low air pressure warning signals?
- How can you tell if your vehicle is equipped with an anti-lock braking system (ABS)?
- Spring brakes are
- How do brakes work on a long, steep downgrade?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- At what measurement is the safety valve USUALLY set to open?
- Which of the following are true about a dual air brake system?
- The low air pressure warning signal will come on before the pressure in the air tanks falls below
- A low pressure warning signal is required on
- All vehicles equipped with air brakes have
- With air brake-equipped vehicles, the parking brakes should be used
- The use of air brakes on a downgrade is only a supplement to the
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We leverage feedback from our vast community of users to understand which topics are most frequently tested. This helps us focus on the areas that are most relevant and beneficial for your preparation. - Expert Content Creation:
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