Free Ohio CDL Air Brakes Practice Test 2022

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

Our CDL practice tests:
Based on 2022 OH commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
OH CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:
2.
When is it OK to leave your truck unattended without applying the parking brakes and choking the wheels?
3.
Parking or emergency brakes of trucks and buses can be legally held on by ____ pressure.
4.
The most important thing to do when a low air pressure warning comes on is:
5.
On a long or steep downgrade, the foot brakes should be used:
6.
In a controlled braking emergency:
7.
The low air pressure warning signal indicates:
8.
What negatively affects the braking power of a spring brake?
9.
To stop the vehicle, air brakes systems use:
10.
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?
11.
When parking a vehicle with a modulating control valve ________.
12.
If the low air warning comes on while you are driving, you should:
13.
The safety valve reduces pressure at ___ psi.
14.
Air braking takes more time than hydraulic braking because:
15.
The air compressor governor controls:
16.
The manual adjustment of automatic slack adjusters is:
17.
After the initial pressure drop, air leakage for combination vehicles should be less than:
18.
The most common problem found in roadside inspections is:
19.
Controlled braking is only possible _________.
20.
Why does a heavily loaded vehicle need a longer distance to stop?
21.
In a dual air brake system, if the air pressure in one part of the system drops enough to set off the low air warning:
22.
Stop light switches are necessary because ________.
23.
Vehicles with air brakes _________.
24.
To check the air compressor governor's "cut in" and "cut out" pressures you need to _________.
25.
What is the function of a safety valve?