Free Kansas CDL Air Brakes Practice Test 2023

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 2021 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
An air compressor can be cooled by _______.
A low air pressure warning signal is ________.
The reduced stopping power caused by overuse of the service brakes and excessive heat is called:
During normal driving, spring brakes are usually held back by:
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.
Total stopping distance for air brakes is longer than that for hydraulic brakes due to ______ distance.
Excessive heat caused by using your brakes too often can also cause:
In ideal conditions a truck or bus with air brakes going at 55 mph would require the stopping distance of how many feet?
What negatively affects the braking power of a spring brake?
When increased application pressure to maintain the same speed becomes necessary, you should ______.
When testing air leakage rates for single vehicles, initial loss rate should be less than:
Generally, air governor cut-in should be at:
Another name for the brake pedal is the "foot valve", or:
In most newer vehicles, the parking brake control will be:
Some vehicles are equipped with a control allowing you to apply the spring brakes gradually, called a:
To check the free play of manual slack adjusters of S-cam brakes, you should park on:
What is a \"Wig Wag\"
If you are driving down a steep downgrade and have reached your safe speed of 40 mph, you would apply the service brake until your speed dropped to ____ mph.
The air compressor governor controls:
The service brake system ________.
When driving an older vehicle that has a manual front brake limiting valve, drivers should:
How does the antilock brake system benefit the driver?
Stab braking should only be used:
On large buses low pressure warning devices usually signal at ______.
The governor stops the compressor from pumping air at: