# 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
Perfect for first-time, renewal applicants
IN CDL Air Brakes Test format:
25 questions
80% passing score
List of questions
1.
The stop light switch:
2.
"A slack adjuster’s free play needs to be adjusted if it is more than about ______ when you pull hard on it."
3.
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
4.
The reduced stopping power caused by overuse of the service brakes and excessive heat is called:
5.
Parking or emergency brakes of trucks and buses can be legally held on by ____ pressure.
6.
In case of a low air situation, the spring brakes should come on at:
7.
In ideal conditions a truck or bus with air brakes going at 55 mph would require the stopping distance of how many feet?
8.
The low air pressure warning signal indicates:
9.
When the air system is low ________.
10.
Another name for the brake pedal is the "foot valve", or:
11.
When using a vehicle with air brakes, the parking needs to be used _______.
12.
All of the following are factors in total stopping distance except:
13.
What is a \"Wig Wag\"
14.
After the initial pressure drop, air leakage for single vehicles should be less than:
15.
The parking brake should not be used when wet in freezing temperatures, or:
16.
Brake drums (or discs) must not have cracks longer than ____ the width of the friction area.
17.
All of the following apply if the low air pressure warning signal does not work except:
18.
If one air system is very low on pressure _______.
19.
Brake linings should not be _______.
20.
Stop light switches are necessary because ________.
21.
Spring brakes are applied:
22.
Vehicles without automatic air tank drains need to be checked manually to remove ________?
23.
The spring brakes of a tractor will come on when the air pressure falls within _______.
24.
A warning to drivers behind you that the air brakes have been applied is the:
25.
What is the purpose of an air storage tank?