Free Kansas CDL Air Brakes Practice Test 2022

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The Kansas CDL Air Brake 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 Kansas 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 Kansas CDL Practice Test to get ready to pass the Kansas CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2022 KS commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
KS CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
A driver needs to be able to see a warning when the air pressure in the service air tanks falls below ______.
2.
The most common type of foundation brakes are:
3.
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.
4.
The air brake lag distance at 55 mph on dry pavement adds about ____ feet.
5.
Excessive use of the service brakes results in overheating which can lead to:
6.
An air brake system is fully charged at what psi?
7.
The supply pressure gauge shows how much pressure:
8.
Brake fade is caused by:
9.
When the engine is off and the parking brake released, a single vehicle air loss rate should be less than ________ psi in one minute.
10.
Normally during anti-lock braking, the driver:
11.
The safety valve reduces pressure at ___ psi.
12.
If your truck or bus has dual parking control valves, you can use pressure from a separate tank to:
13.
Total stopping distance with air brakes is Perception distance + Braking Distance + Brake Lag Distance +:
14.
Average stopping distance under normal conditions at 55 mph is:
15.
The S-cam:
16.
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
17.
Automatic air tanks _______.
18.
The most common type of foundation brake is?
19.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
20.
Why should you drain water from compressed air tanks?
21.
During a normal drive, the spring brakes are held back by _____.
22.
Vehicles with air brakes _________.
23.
What is a wig wag ?
24.
What is the purpose of an air storage tank?
25.
If your brakes are wet, what should you do to dry them quicker?