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.
An air compressor can be cooled by _______.
2.
A dual air brake system ________.
3.
In case of a low air situation, the spring brakes should come on at:
4.
While applying the brakes, what tells the driver how much air pressure is being used?
5.
When the engine is off and the parking brake released, a single vehicle air loss rate should be less than ________ psi in one minute.
6.
Where is the modulating control valve located on some vehicles?
7.
What type of brakes pushes a wedge between the ends of two brake shoes to stop the vehicle?
8.
Air governor cut-out should be at around:
9.
Besides heat, another cause of brake fade is:
10.
What tells the driver how much air pressure is in the air tanks?
11.
After the initial pressure drop, air leakage for combination vehicles should be less than:
12.
To stop the vehicle, the brake shoes and linings are pushed against:
13.
If you need to make an emergency stop, you should brake so that you can ________.
14.
At what level will the low air warning usually take effect?
15.
Brake drums should not have cracks longer than what length?
16.
Why should you check the brake adjustment often?
17.
When driving an older vehicle that has a manual front brake limiting valve, drivers should:
18.
The braking power of the spring brakes ______.
19.
Initial air leakage rate for combination vehicles should be:
20.
Why do air brakes take longer to stop than hydraulic brakes?
21.
On large buses low pressure warning devices usually signal at ______.
22.
What is used to put alcohol into the system and reduce ice risk?
23.
Spring brakes are applied:
24.
What does ABS stand for?
25.
What is the purpose of an air storage tank?