- 0 Incorrect (6 allowed to pass)
- 0 Correct
- Updated for February 2025
- Based on 2025 NJ commercial driver's license manual
Free New Jersey CDL Air Brakes Test 2025
Driving commercial motor vehicles (CMVs) with air brakes requires specialized knowledge and skills, including passing the New Jersey MVC CDL Air Brakes knowledge test. If you fail, you must wait seven days before testing again. Our practice test is your key to passing on the first attempt. If you don’t pass, your CDL will include the restriction “L,” preventing you from operating CMVs with air brakes. In New Jersey, the Appalachian Highlands in the northwestern part of the state present hilly terrain that challenges braking systems. Furthermore, long-distance travel along the coastal plains of the southeast necessitates the use of air brakes and qualified drivers. The stop-and-go traffic in urban areas like Newark and Jersey City also calls for precise braking provided by air brakes. As most semi-trucks and tractor-trailers rely on air brakes, removing the “L” restriction is essential.
Industries across the Garden State rely on drivers with the air brake qualification, including logistics (ports), pharmaceuticals, and tourism (Atlantic City and Jersey Shore). Notable companies requiring the air brakes qualification include FedEx Freight and Amazon Transportation in the freight industry, New Jersey Transit in the public transportation sector and Caterpillar equipment dealers in the construction sector. Additionally, Academy Bus Lines requires air brake-qualified drivers in the charter bus industry, as do all school districts operating full-size school buses. The “L” restriction severely limits your job prospects, making the above-listed job prospects unattainable.
Our practice tests help you pass your air brake knowledge test. But, the information you learn will also be useful as you practice inspecting and operating CMVs to pass your skills test. The official MVC test ensures you’re proficient in air brake systems, effective operation, and air-brake inspection procedures. The skills test includes inspecting components, testing for air pressure and leaks, and operating a vehicle equipped with air brakes. The written Air Brakes knowledge test features multiple-choice questions based on the official New Jersey CDL manual (New Jersey CDL Handbook 2025) and requires a score of at least 80% to pass.
Our New Jersey MVC CDL Air Brakes Practice Tests mirror material used on the official knowledge test and mimic the content and format you will face. Additionally, our practice test questions and answers provide responses in real time, a scientifically proven method for improving retention. With our resources, you can learn quickly and be confident of passing your official exam.
- 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 NJ MVC exam
questions
correct answers to pass
passing score
List of questions (classic view)
- Why must you pass a knowledge test on air brakes?
- Which of the following is NOT part of the air brake system?
- Which of the following is NOT part of the braking process when you're driving a tractor-trailer combination vehicle with an anti-lock braking system (ABS)?
- The tractor protection valve
- Slack adjusters are
- The purpose of a supply pressure gauge is
- How do brakes work on a long, steep downgrade?
- How would you check your truck's slack adjusters?
- When should you drain your air tanks?
- Which vehicles must have low air pressure warning signals?
- What is the best way to test your vehicle's low air pressure warning signal?
- Which of the following will be true about your brake function if your anti-lock braking system (ABS) fails?
- Which of the following is true about a dual air brake system?
- An anti-lock braking system (ABS)
- If the air tanks are not drained,
- Which of the following can cause brakes to fade or fail?
- Spring brakes are
- How can you tell if your vehicle is equipped with an anti-lock braking system (ABS)?
- At what measurement is the safety valve USUALLY set to open?
- Under which conditions are front wheel brakes good?
- Which of the following is NOT part of the drum brake?
- When should you use the parking brake?
- After the initial drop, the maximum acceptable leakage rates per minute are
- Which of the following should you do before leaving your vehicle unattended?
- What is the best way to test if your vehicle's spring brakes come on automatically?
- 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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