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
The safety valve discharges automatically at the pressure of:
"A slack adjuster’s free play needs to be adjusted if it is more than about ______ when you pull hard on it."
Air tanks need to be drained ______.
To test the vehicle's service brakes, move the vehicle:
If your truck has a properly functioning dual air brake system and minimum size air tanks, the air pressure should build up from 85 to 100 psi within how many seconds?
On a long or steep downgrade, the foot brakes should be used:
The 3 individual systems of the air brakes are the service brakes, emergency brake, and:
With air brake vehicles, the parking brake should be used:
The low air pressure warning signal indicates:
To stop the vehicle, air brakes systems use:
Where is the modulating control valve located on some vehicles?
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
It is not safe to drive a vehicle that has brake drums with cracks that are longer than _____ of the width of the friction area.
Air braking takes more time than hydraulic braking because:
Pressing and releasing the brake pedal unnecessarily:
Under normal braking conditions, the vehicle:
The use of brakes on a long and steep downgrade under normal conditions is only a supplement to:
Pushing the brake pedal down harder __________.
Some vehicles are equipped with a separate air tank used specifically to release the spring brakes in an emergency, called a:
If air supply drops when driving, the tractor protection valve ________.
Brake drums or discs _______.
To check the air compressor governor's "cut in" and "cut out" pressures you need to _________.
What is the purpose of a supply pressure gauge?
In a dual air brake system, one system will typically control the rear brakes, and the other:
Vehicles with air brakes have pressure gauges connected to the _______.