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 air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
2.
A low pressure warning signal could be __________.
3.
Excessive use of the service brakes results in overheating which can lead to:
4.
Under normal conditions, in order to engage the parking brakes the driver should:
5.
Emergency stab braking is:
6.
The ____ shows how much pressure is in the air tanks.
7.
When should the spring brakes activate?
8.
When you release the brakes and reduce the air pressure what makes up for that air loss?
9.
If the low air warning comes on while you are driving, you should:
10.
The safety valve reduces pressure at ___ psi.
11.
Besides heat, another cause of brake fade is:
12.
The parking brake should not be used when wet in freezing temperatures, or:
13.
Pressing and releasing the brake pedal unnecessarily:
14.
The trailer air supply knob is usually:
15.
After the initial pressure drop, air leakage for combination vehicles should be less than:
16.
To stop the vehicle, the brake shoes and linings are pushed against:
17.
You should avoid using the parking brake when _______.
18.
The service brake system ________.
19.
Pushing the brake pedal down harder __________.
20.
How are brakes designed?
21.
At minimum, a dual air system should build up to what psi in the primary and secondary systems?
22.
What is proper braking technique for drivers travelling down a hill or any other downgrade?
23.
The governor stops the compressor from pumping air at:
24.
A warning to drivers behind you that the air brakes have been applied is the:
25.
The warning light and buzzer will come on when the air pressure in either system drops below what psi?