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 air compressor can be cooled by _______.
2.
A low air pressure warning signal is ________.
3.
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks fall below ____ psi.
4.
All air brake equipped vehicles have:
5.
In case of a low air situation, the spring brakes should come on at:
6.
Why drain water from compressed air tanks?
7.
The application pressure gauge shows how much air pressure you:
8.
When increased application pressure to maintain the same speed becomes necessary, you should ______.
9.
Air governor cut-out should be at around:
10.
When you need to depress the brakes harder and harder just to maintain the same speed this means ______.
11.
Spring brakes will come on automatically, but the parking brake can also be applied:
12.
Why is manually adjusting automatic slack adjusters dangerous?
13.
The safety valve is set automatically when pressure is:
14.
If the spring brakes are on, when should you push the brake pedal?
15.
What must the air pressure be, at minimum, in both parts of a dual air brake system?
16.
Which of these is NOT a proper time to apply the parking brakes?
17.
The emergency spring brake release knob is:
18.
The manual adjustment of automatic slack adjusters is:
19.
Total stopping distance with air brakes is Perception distance + Braking Distance + Brake Lag Distance +:
20.
Average stopping distance under normal conditions at 55 mph is:
21.
On newer vehicles what color is the parking brake knob?
22.
The safety valve in the air compressor tank is set to open at _____.
23.
During a normal drive, the spring brakes are held back by _____.
24.
The spring brakes of a tractor will come on when the air pressure falls within _______.
25.
Typically, at what psi does the air compressor governor stop the compressor from pumping air?