# 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 air brake lag distance at 55 mph on dry pavement adds about ____ feet.
2.
All air brake equipped vehicles have:
3.
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls below ____ psi.
4.
Your truck or bus has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?
5.
The spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure drops below ___ psi.
6.
Spring brakes will generally come on at:
7.
The supply pressure gauge shows how much pressure:
8.
9.
When testing air leakage rates for single vehicles, initial loss rate should be less than:
10.
Generally, air governor cut-in should be at:
11.
Another name for the brake pedal is the "foot valve", or:
12.
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
13.
What is the purpose of an antilock braking system (ABS)?
14.
If you must make an emergency stop, you should brake so you:
15.
What must the air pressure be, at minimum, in both parts of a dual air brake system?
16.
The emergency spring brake release knob is:
17.
The S-cam:
18.
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
19.
Automatic air tanks _______.
20.
In tractors and straight trucks spring brakes will come on fully when the air pressure drops to what range?
21.
How does the antilock brake system benefit the driver?
22.
Why do air brakes take longer to stop than hydraulic brakes?
23.
What is an alternative name for a brake pedal?
24.
Vehicles with air brakes have pressure gauges connected to the _______.
25.
To test the parking brake you should _______.