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
An air compressor can be cooled by _______.
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks fall below ____ psi.
The reduced stopping power caused by overuse of the service brakes and excessive heat is called:
When is it OK to leave your truck unattended without applying the parking brakes and choking the wheels?
The brake system that applies and releases the brakes when the driver uses the brake pedal is the ________ brake system.
With air brake vehicles, the parking brake should be used:
In ideal conditions a truck or bus with air brakes going at 55 mph would require the stopping distance of how many feet?
What should a driver do when the low air pressure warning signal comes on?
Air governor cut-out should be at around:
When using a vehicle with air brakes, the parking needs to be used _______.
When your brake's main air pressure is lost ________.
Some vehicles are equipped with a control allowing you to apply the spring brakes gradually, called a:
"Some air brake systems have an alcohol evaporator. What may happen if you don’t keep the proper level of alcohol?"
What happens when your brake drums get very hot?
Why is manually adjusting automatic slack adjusters dangerous?
The parking brake knob is usually:
Besides heat, another cause of brake fade is:
Total stopping distance with air brakes is Perception distance + Braking Distance + Brake Lag Distance +:
If air pressure is not built up within the correct amount of time, then:
The service brake system ________.
How should the air leakage rate be tested?
When driving an older vehicle that has a manual front brake limiting valve, drivers should:
What is proper braking technique for drivers travelling down a hill or any other downgrade?
Vehicles with ABS have malfunction lamps that are what color?
Water and oil _______.