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.
A driver needs to be able to see a warning when the air pressure in the service air tanks falls below ______.
2.
Air brakes consist of ________.
3.
When inspecting air brakes:
4.
How far should manual slack adjusters move before they need to be adjusted?
5.
An air brake system is fully charged at what psi?
6.
Under normal conditions, in order to engage the parking brakes the driver should:
7.
In a controlled braking emergency:
8.
The supply pressure gauge shows how much pressure:
9.
When the safety valve releases air this indicates ___________.
10.
Which braking system applies and releases the parking brakes when you use the parking brake control?
11.
What type of brakes pushes a wedge between the ends of two brake shoes to stop the vehicle?
12.
What is the purpose of an antilock braking system (ABS)?
13.
If the air compressor should develop a leak, what keeps the air in the tanks?
14.
"Some air brake systems have an alcohol evaporator. What may happen if you don’t keep the proper level of alcohol?"
15.
When checking the air pressure buildup, pressure should build:
16.
The air compressor governor controls:
17.
Average stopping distance under normal conditions at 55 mph is:
18.
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
19.
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
20.
All of the following apply if the low air pressure warning signal does not work except:
21.
In tractors and straight trucks spring brakes will come on fully when the air pressure drops to what range?
22.
When driving an older vehicle that has a manual front brake limiting valve, drivers should:
23.
Some vehicles are equipped with a separate air tank used specifically to release the spring brakes in an emergency, called a:
24.
You should use the parking brake _____________.
25.
Air tanks should be drained: