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.
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?
2.
A low pressure warning signal could be __________.
3.
When is it OK to leave your truck unattended without applying the parking brakes and choking the wheels?
4.
The most important thing to do when a low air pressure warning comes on is:
5.
The ____ shows how much pressure is in the air tanks.
6.
The brake system that applies and releases the brakes when the driver uses the brake pedal is the ________ brake system.
7.
When the engine is off and the parking brake released, a single vehicle air loss rate should be less than ________ psi in one minute.
8.
When you need to apply more pressure to help your brakes work normally effectively, this means that your brakes are fading. Which of the following can cause fading brakes?
9.
Another name for the brake pedal is the "foot valve", or:
10.
In most newer vehicles, the parking brake control will be:
11.
What is the purpose of an antilock braking system (ABS)?
12.
"Some air brake systems have an alcohol evaporator. What may happen if you don’t keep the proper level of alcohol?"
13.
The parking brake knob is usually:
14.
The parking brake should not be used when wet in freezing temperatures, or:
15.
The S-cam:
16.
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
17.
Automatic air tanks _______.
18.
Why should you check the brake adjustment often?
19.
The braking power of the spring brakes ______.
20.
Some vehicles are equipped with a separate air tank used specifically to release the spring brakes in an emergency, called a:
21.
If the air compressor has its own oil supply you should do what before driving?
22.
The safety valve in the air compressor tank is set to open at _____.
23.
On large buses low pressure warning devices usually signal at ______.
24.
What does the air compressor governor control?
25.
To prevent too much pressure from building up in the system, what is installed?