# 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
Perfect for first-time, renewal applicants
ND CDL Air Brakes Test format:
25 questions
80% passing score
List of questions
1.
The most common type of foundation brakes are:
2.
Air brakes consist of ________.
3.
The stop light switch:
4.
How far should manual slack adjusters move before they need to be adjusted?
5.
The proper use of the brakes when going down a long steep grade after selecting a proper gear is to brake until your speed is about ____ below the posted speed and release your brake.
6.
Parking or emergency brakes of trucks and buses can be legally held on by ____ pressure.
7.
The main factor in causing brake fade is:
8.
If you must make an emergency stop, you should brake so you:
9.
When the air system is low ________.
10.
Which braking system applies and releases the parking brakes when you use the parking brake control?
11.
The safety valve is set automatically when pressure is:
12.
What is a \"Wig Wag\"
13.
Which of these is NOT a proper time to apply the parking brakes?
14.
15.
Under normal braking conditions, the vehicle:
16.
The air compressor is connected to the engine through ______.
17.
Stab braking should only be used:
18.
During a normal drive, the spring brakes are held back by _____.
19.
How often should alcohol containers be checked during cold weather?
20.
Spring brakes are applied:
21.
What is the purpose of a supply pressure gauge?
22.
Vehicles without automatic air tank drains need to be checked manually to remove ________?
23.
Typically, at what psi does the air compressor governor stop the compressor from pumping air?
24.
On a long or steep downgrade, how should vehicle speed be primarily controlled?
25.
The warning light and buzzer will come on when the air pressure in either system drops below what psi?