Free North Dakota CDL Air Brakes Practice Test 2023

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The North Dakota CDL Air Brake test has some differences from other endorsements because your license will receive a mark of restriction if you fail the test. So having good preparation before exam day is very necessary. To ensure that our questions are relevant, all of our CDL practice test packs are based on the North Dakota CDL Manual. Each question has a detailed explanation for you to thoroughly learn the format and the topic. Don't be afraid of having a restriction on your license. Let’s try our ND CDL Practice Test to get ready to pass the North Dakota CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2021 ND commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
ND CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
A driver needs to be able to see a warning when the air pressure in the service air tanks falls below ______.
When inspecting air brakes:
During normal driving, spring brakes are usually held back by:
Modern air brakes combine three different systems. They are the service, the parking, and the _____ brakes.
The application pressure gauge shows how much air pressure you:
If the air compressor should develop a leak, what keeps the air in the tanks?
It is not safe to drive a vehicle that has brake drums with cracks that are longer than _____ of the width of the friction area.
The air compressor governor controls:
Average stopping distance under normal conditions at 55 mph is:
In case of emergency stops, drivers should:
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
If you need to make an emergency stop, you should brake so that you can ________.
On newer vehicles what color is the parking brake knob?
Brake drums should not have cracks longer than what length?
The most common type of foundation brake is?
In a dual air brake system, if the air pressure in one part of the system drops enough to set off the low air warning:
At minimum, a dual air system should build up to what psi in the primary and secondary systems?
The air tanks must be drained because:
Initial air leakage rate for combination vehicles should be:
Why should air tanks be drained completely?
Air tanks should be drained:
To avoid damaging the brakes, what should you never do while the spring brakes are applied?
In a dual air brake system, one system will typically control the rear brakes, and the other:
Required on all vehicles with air brakes, what tells the driver that air pressure is too low?
What happens when pressure is put on the air brakes?