Free Kentucky CDL Air Brakes Practice Test 2022

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

Our CDL practice tests:
Based on 2022 KY commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
KY CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
The stop light switch:
2.
The air brake lag distance at 55 mph on dry pavement adds about ____ feet.
3.
Modern air brakes combine three different systems. They are the service, the parking, and the _____ brakes.
4.
A dual air brake system ________.
5.
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?
6.
Why drain water from compressed air tanks?
7.
The main factor in causing brake fade is:
8.
When the air system is low ________.
9.
When you release the brakes and reduce the air pressure what makes up for that air loss?
10.
When using a vehicle with air brakes, the parking needs to be used _______.
11.
If your truck has a dual air brake system, and one of the systems is low on pressure:
12.
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.
13.
To stop the vehicle, the brake shoes and linings are pushed against:
14.
Repeatedly partially increasing and pressing the brake pedal may result in:
15.
How should the air leakage rate be tested?
16.
Why should you check the brake adjustment often?
17.
If the air compressor has its own oil supply you should do what before driving?
18.
On large buses low pressure warning devices usually signal at ______.
19.
What does the air compressor governor control?
20.
The parking brake should be used:
21.
To avoid damaging the brakes, what should you never do while the spring brakes are applied?
22.
Manual air tank drains require:
23.
What is the function of a safety valve?
24.
To test the parking brake you should _______.
25.
If your brakes are wet, what should you do to dry them quicker?