Free South Carolina CDL Combination Vehicles Practice Test 2023

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

Our CDL practice tests:
Based on 2021 SC commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
SC CDL Combination Vehicles Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
1.
The likelihood of a fully loaded rig turning over compared to an empty trailer is:
2.
When you open the emergency shut-off valve at the back of the last trailer after supplying air to trailer(s):
3.
How much space should be allowed between the upper and lower fifth wheel after coupling?
4.
A function of the tractor protection valve is:
5.
In order to allow the trailer brakes to be applied more quickly, what is connected to the service air line?
6.
Which part of the kingpin should the locking jaw close around?
7.
If you have to enter another traffic lane to complete a wide turn, you should:
8.
If the service line comes apart while you are driving a combination vehicle, but the emergency line stays together, what will happen right away?
9.
When should you use the hand valve to park a combination vehicle?
10.
Improperly greased or lubricated fifth wheels will cause:
11.
A driver crosses the air lines when hooking up to an old trailer. What will happen?
12.
Trailer landing gear:
13.
When coupling or uncoupling, all of these apply to the trailer except:
14.
All of these are part of the final 3 steps of uncoupling the trailer except:
15.
The safety latch for the fifth wheel locking lever must be _____ for a coupling to be complete.
16.
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
17.
To test the tractor protection valve, pump the brakes with the engine off until the trailer air supply knob pops out, usually at:
18.
At the back of trailer used to tow other trailers are shut-off valves, also called:
19.
When coupling, the proper position of the fifth wheel is:
20.
In case of landing gear failure while pulling out from under it, you should: