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.
Air brakes consist of ________.
2.
The stop light switch:
3.
The reduced stopping power caused by overuse of the service brakes and excessive heat is called:
4.
At 55 mph on dry pavement, the air brake lag distance is how many feet?
5.
A dual air brake system ________.
6.
Air governor cut-out should be at around:
7.
When using a vehicle with air brakes, the parking needs to be used _______.
8.
When does the air compressor governor allow air to start pumping?
9.
If the air compressor should develop a leak, what keeps the air in the tanks?
10.
The safety valve is set automatically when pressure is:
11.
What is a \"Wig Wag\"
12.
How should you check that your service brakes are working properly?
13.
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:
14.
If your vehicle has an alcohol evaporator, every day during cold weather you should:
15.
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
16.
Automatic air tanks _______.
17.
If one air system is very low on pressure _______.
18.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
19.
Why do air brakes take longer to stop than hydraulic brakes?
20.
Initial air leakage rate for combination vehicles should be:
21.
What does the air compressor governor control?
22.
Spring brakes are applied:
23.
What is used to put alcohol into the system and reduce ice risk?
24.
Manual air tank drains require:
25.
Water and oil _______.