Free Connecticut CDL Air Brakes Practice Test 2023

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 2021 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
To test air service brakes you should:
An air compressor can be cooled by _______.
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks fall below ____ psi.
In case of a low air situation, the spring brakes should come on at:
While applying the brakes, what tells the driver how much air pressure is being used?
The application pressure gauge shows how much air pressure you:
What should a driver do when the low air pressure warning signal comes on?
What type of brakes pushes a wedge between the ends of two brake shoes to stop the vehicle?
Air governor cut-out should be at around:
If your truck has a dual air brake system, and one of the systems is low on pressure:
After the initial pressure drop, air leakage for combination vehicles should be less than:
To stop the vehicle, the brake shoes and linings are pushed against:
If your vehicle has an alcohol evaporator, every day during cold weather you should:
All of the following apply if the low air pressure warning signal does not work except:
If you need to make an emergency stop, you should brake so that you can ________.
Brake drums should not have cracks longer than what length?
Why should you check the brake adjustment often?
The air compressor is connected to the engine through ______.
Initial air leakage rate for combination vehicles should be:
Why do air brakes take longer to stop than hydraulic brakes?
On large buses low pressure warning devices usually signal at ______.
What is proper braking technique for drivers travelling down a hill or any other downgrade?
To check the air compressor governor's "cut in" and "cut out" pressures you need to _________.
What is used to put alcohol into the system and reduce ice risk?
Required on all vehicles with air brakes, what tells the driver that air pressure is too low?