Free Connecticut CDL Air Brakes Practice Test 2022

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The 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 Connecticut CDL Practice test questions are based on the CT 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 free CDL Practice Test to get ready to pass the Connecticut CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2022 CT commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
CT CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
The stop light switch:
2.
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
3.
Modern air brakes combine three different systems. They are the service, the parking, and the _____ brakes.
4.
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?
5.
The supply pressure gauge shows how much pressure:
6.
The main factor in causing brake fade is:
7.
If you must make an emergency stop, you should brake so you:
8.
When should the spring brakes activate?
9.
When you release the brakes and reduce the air pressure what makes up for that air loss?
10.
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
11.
Spring brakes will come on automatically, but the parking brake can also be applied:
12.
To check the free play of manual slack adjusters of S-cam brakes, you should park on:
13.
Why is manually adjusting automatic slack adjusters dangerous?
14.
If your truck or bus has dual parking control valves, you can use pressure from a separate tank to:
15.
Pressing and releasing the brake pedal unnecessarily:
16.
The most common problem found in roadside inspections is:
17.
In dual air systems, how long should it take air pressure to build 85 to 100 psi?
18.
Brake linings should not be _______.
19.
How does the antilock brake system benefit the driver?
20.
If air supply drops when driving, the tractor protection valve ________.
21.
The belt of a belt-driven air compressor should be ________.
22.
The governor stops the compressor from pumping air at:
23.
Vehicles with air brakes have pressure gauges connected to the _______.
24.
What is the function of a safety valve?
25.
To test the parking brake you should _______.