Free Kentucky CDL Air Brakes Practice Test 2023

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 2021 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
To test air service brakes you should:
An automatic wig wag will rise out of your view when the pressure in your system rises above what psi?
Your truck or bus has a dual air brake system. If a low-pressure warning comes on for only one system, what should you do?
In case of emergency when driving a vehicle equipped with dual parking control valves, you should:
The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls below ____ psi.
With air brake vehicles, the parking brake should be used:
To make sure that the spring brakes come on automatically, do all of the following except:
When you need to depress the brakes harder and harder just to maintain the same speed this means ______.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
Some vehicles are equipped with a control allowing you to apply the spring brakes gradually, called a:
When brakes are applied, the brake shoes will press against the:
The level at which the air compressor stops pumping air is:
If the low air pressure warning light comes on, you should:
The emergency spring brake release knob is:
If air pressure is not built up within the correct amount of time, then:
Pushing the brake pedal down harder __________.
Initial air leakage rate for combination vehicles should be:
Why should air tanks be drained completely?
How often should alcohol containers be checked during cold weather?
The belt of a belt-driven air compressor should be ________.
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 _________.
On a long or steep downgrade, how should vehicle speed be primarily controlled?
What does ABS stand for?