Free North Carolina CDL Combination Vehicles Practice Test 2023

You have to pass the North Carolina CDL combination vehicles endorsement to get ready for propelling your career with your license. You are looking for a good NC CDL 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 NC 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 North Carolina CDL Combination Vehicles Practice Test today and walk out with your endorsement!

Our CDL practice tests:
Based on 2021 NC commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
NC CDL Combination Vehicles Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
To prevent moisture from entering the electrical cable when disconnected:
Semi-trailers made before 1975 that are equipped with air brakes:
After supplying air to the trailer, how should you check for crossed air lines?
The air lines on a combination vehicle are often colored to prevent them from mixing up. The emergency line is _____, the service line is _________.
One good way to prevent rollover is:
The iron trailer supports are up and the trailer is resting on the tractor. Make sure:
When connecting the glad hands, press the two seals with the couplers together at what degree to each other?
Before coupling or uncoupling, the trailer wheels should always be:
When unlocking the fifth wheel in Step 6, all of the following apply except:
When parking trailers without spring brakes, it is very important to:
How should you test the tractor-semitrailer connection for security?
How much space should there be between the upper and lower fifth wheel?
A fifth wheel in proper position for coupling will have:
After you have coupled the trailer you should raise the landing gear by using:
You supply air to the trailer tanks by:
The "rearward amplification" value means:
What gear should the tractor engine be in after you uncouple the trailer and are inspecting the trailer supports?
When backing under the trailer, do all of the following except:
In case of landing gear failure while pulling out from under it, you should:
While checking if the trailer is securely coupled to the tractor, the landing gears should be: