Free Arkansas CDL Air Brakes Practice Test 2022

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The Arkansas CDL Air Brakes 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 questions are based on the Arkansas 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 Arkansas CDL practice tests to get ready to pass the Arkansas CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2022 AR commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
AR CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
"A slack adjuster’s free play needs to be adjusted if it is more than about ______ when you pull hard on it."
2.
The reduced stopping power caused by overuse of the service brakes and excessive heat is called:
3.
Your truck or bus has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?
4.
A dual air brake system ________.
5.
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.
6.
In case of a low air situation, the spring brakes should come on at:
7.
With air brake vehicles, the parking brake should be used:
8.
When the safety valve releases air this indicates ___________.
9.
Air governor cut-out should be at around:
10.
When parking a vehicle with a modulating control valve ________.
11.
Some vehicles are equipped with a control allowing you to apply the spring brakes gradually, called a:
12.
What happens when your brake drums get very hot?
13.
It is not safe to drive a vehicle that has brake drums with cracks that are longer than _____ of the width of the friction area.
14.
Which of these is NOT a proper time to apply the parking brakes?
15.
In case of emergency stops, drivers should:
16.
In a dual air brake system, the first system, supplying the rear brakes, is commonly known as the "primary" system, and the other as the:
17.
You should avoid using the parking brake when _______.
18.
At minimum, a dual air system should build up to what psi in the primary and secondary systems?
19.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
20.
The air tanks must be drained because:
21.
If air supply drops when driving, the tractor protection valve ________.
22.
Air tanks should be drained:
23.
The spring brakes of a tractor will come on when the air pressure falls within _______.
24.
What brake system uses part of the service and parking brake systems to stop the vehicle in the event of a brake system failure?
25.
What is the purpose of a supply pressure gauge?