Free Oregon CDL Combination Vehicles Practice Test 2023

You have to pass the Oregon CDL combination vehicles endorsement to get ready for propelling your career with your license. You are looking for a good Oregon CDL Practice Test source for your coming CDL test? You are in the right place. Our practice test is a great resource for beginners. The test is designed for you to have exactly the experience of the exam as you will be more familiar with both the test format and the subject. Our CDL practice test covers topics ranging from combination vehicle maintenance to safely driving a complex rig. Each question is based on the official Oregon CDL manual so you can be sure that the information in our test is accurate and relevant to your examination. In addition, each question has a detailed explanation so that it is very useful for you to learn from your mistakes. Preparing well before test day with questions and content that we cover. Start with our Free Oregon CDL Combination Vehicles Practice Test today and walk out with your endorsement!

Our CDL practice tests:
Based on 2021 OR commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
OR CDL Combination Vehicles Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
After supplying air to the trailer, how should you check for crossed air lines?
A function of the tractor protection valve is:
You have coupled with a semitrailer, where should you put the iron trailer supports before driving away?
If your trailer goes into a skid, you should do all of the following except:
Over 50% of truck driver accident deaths are caused by:
When you are uncoupling a loaded trailer, you should lower the landing gear until it:
When you get ready to back under a semitrailer you should line up:
After you lock the kingpin into the fifth wheel, you should check the connection by:
When backing under the trailer, air lines:
The trailer hand valve should be used:
To stop other drivers from passing you on the right when turning wide:
The locking jaws should be around:
The tractor should be positioned to back under the trailer:
Converter dollies:
Why should you be sure that the fifth wheel plate is greased as required?
To stop a trailer skid you should:
You are coupling a tractor to a semitrailer and have backed up, but are not under it. What should you hook up before backing under?
Like tractor air tanks, trailer air tanks should be kept free of dirt and oil by:
When uncoupling the trailer, after you shut off the trailer air supply and lock the trailer brakes, you should:
While driving, you should use the trailer hand valve when?