Free Oregon CDL Air Brakes Practice Test 2022

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

Our CDL practice tests:
Based on 2022 OR commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
OR CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
An automatic wig wag will rise out of your view when the pressure in your system rises above what psi?
2.
The stop light switch:
3.
Modern air brakes combine three different systems. They are the service, the parking, and the _____ brakes.
4.
The proper use of the brakes when going down a long steep grade after selecting a proper gear is to brake until your speed is about ____ below the posted speed and release your brake.
5.
A mechanical device that drops a low air warning into a drivers view is called a:
6.
Your brakes are fading when:
7.
Generally, air governor cut-in should be at:
8.
When performing the controlled braking method for an emergency stop, you are _________.
9.
In most newer vehicles, the parking brake control will be:
10.
When your brake's main air pressure is lost ________.
11.
If you must make an emergency stop, you should brake so you:
12.
Air braking takes more time than hydraulic braking because:
13.
The level at which the air compressor stops pumping air is:
14.
How should you check that your service brakes are working properly?
15.
In case of emergency stops, drivers should:
16.
The S-cam:
17.
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
18.
At what level will the low air warning usually take effect?
19.
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:
20.
How does the antilock brake system benefit the driver?
21.
Why should air tanks be drained completely?
22.
Vehicles with air brakes _________.
23.
Air tanks should be drained:
24.
To prevent too much pressure from building up in the system, what is installed?
25.
What happens when pressure is put on the air brakes?