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.
While driving behind another vehicle, under good conditions, you should allow at least one second between your vehicle and the vehicle ahead for each ____ feet of your vehicle length.
2.
For proper hose coupling, lines are often color-coded. Service lines are usually:
3.
The air leakage rate for a combination vehicle (engine off, brakes on) should not be more than _____ psi per minute.
4.
When traveling under 40 mph, how much distance should you leave, at minimum, from the car in front of you?
5.
After you supply air to the trailer, make sure the air lines are not crossed and the trailer brakes are working. This is done by:
6.
Over 50% of truck driver accident deaths are caused by:
7.
Supplied by the service line from the tractor, each trailer or dolly has its own:
8.
To help prevent rollover, keep the center of gravity of the load as low as possible, and:
9.
After you lock the kingpin into the fifth wheel, you should check the connection by:
10.
There are two things that a driver can do to prevent a rollover. They are: (1) go slow around turns, and (2):
11.
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
12.
When unlocking the fifth wheel in Step 6, all of the following apply except:
13.
How much space should there be between the upper and lower fifth wheel?
14.
The "rearward amplification" value means:
15.
When backing a tractor under a trailer you should:
16.
You have a major leak in the service line, and you put on the brakes. Service air will escape and cause the:
17.
After connecting the air lines but before backing under the trailer you should:
18.
While driving, you should use the trailer hand valve when?
19.
If you cannot complete your turn without entering another traffic lane you should:
20.
Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer?