Free Indiana CDL Air Brakes Practice Test 2023

Do you need an Indiana Air Brakes endorsement or an L endorsement for your commercial driving license? The Indiana 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 Indiana 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 with our Indiana CDL Practice Test to get ready to pass the Indiana CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2021 IN commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
IN 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:
The air compressor stops pumping air at what psi?
What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus?
Air brakes consist of ________.
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?
At 55 mph on dry pavement, the air brake lag distance is how many feet?
The 3 individual systems of the air brakes are the service brakes, emergency brake, and:
Why drain water from compressed air tanks?
Excessive heat caused by using your brakes too often can also cause:
Your truck has a dual air system and one of the systems loses its pressure. What will happen?
In a controlled braking emergency:
Brake fade is caused by:
What negatively affects the braking power of a spring brake?
When brakes are applied, the brake shoes will press against the:
If your truck or bus has dual parking control valves, you can use pressure from a separate tank to:
The level at which the air compressor stops pumping air is:
Average stopping distance under normal conditions at 55 mph is:
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
To test the parking brake, stop the vehicle, put the parking brake on, and:
If you need to make an emergency stop, you should brake so that you can ________.
Some vehicles are equipped with a separate air tank used specifically to release the spring brakes in an emergency, called a:
The belt of a belt-driven air compressor should be ________.
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?