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.
The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:
2.
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?
3.
During normal driving, spring brakes are usually held back by:
4.
Air tanks need to be drained ______.
5.
At 55 mph on dry pavement, the air brake lag distance is how many feet?
6.
Where is the modulating control valve located on some vehicles?
7.
What type of brakes pushes a wedge between the ends of two brake shoes to stop the vehicle?
8.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
9.
To check the free play of manual slack adjusters of S-cam brakes, you should park on:
10.
What is a \"Wig Wag\"
11.
If the low air pressure warning light comes on, you should:
12.
What tells the driver how much air pressure is in the air tanks?
13.
If your vehicle has an alcohol evaporator, every day during cold weather you should:
14.
Under normal braking conditions, the vehicle:
15.
To test the parking brake, stop the vehicle, put the parking brake on, and:
16.
The most common problem found in roadside inspections is:
17.
Automatic air tanks _______.
18.
Which of the following helps the stop light switch work?
19.
The air compressor is connected to the engine through ______.
20.
How often should alcohol containers be checked during cold weather?
21.
What brake system uses part of the service and parking brake systems to stop the vehicle in the event of a brake system failure?
22.
The parking brake should be used:
23.
Vehicles with air brakes have pressure gauges connected to the _______.
24.
If your brakes are wet, what should you do to dry them quicker?
25.
To test the parking brake you should _______.