Free South Carolina CDL Double/Triple Trailers Practice Test 2023

Do you know how to pair double or triple trailers? If you are planning to take the South Carolina CDL double/triple trailer endorsement test, make sure to know it! Our SC CDL Practice Test has the same questions as the real exam which is based on the SC CDL Manual. It covers most of the subject areas on the Double/Triple Trailers Test such as pulling double and triple trailers, the risk of rollover, managing space, and special considerations when hauling multiple trailers. In addition, each question has a detailed explanation that will help you understand the concept and answer future questions about it correctly. If you don't get the pass right away, you can take this CDL practice test an unlimited number of times to make sure you learn all the questions. Let’s try our Free South Carolina CDL Double/Triple Trailers Practice Test today and pass your CDL endorsement exam! Good luck and keep driving safely!

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 Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
1.
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
2.
When coupling, correct trailer height should:
3.
How often should alcohol containers be checked during cold weather?
4.
After coupling, the air shut-off valves at the back of the first trailer should be:
5.
Brake drums should not have cracks longer than what length?
6.
The air compressor should pump air starting at what psi?
7.
You are driving a set of doubles and a set of trailer wheels goes into a skid. Which of these is most likely to occur?
8.
You are visually checking the coupling of a converter dolly to the rear trailer. How much space should be between the upper and lower fifth wheel?
9.
A safety valve that releases air _______.
10.
An air compressor can be cooled by _______.
11.
Why should you check the brake adjustment often?
12.
Where is compressed air stored?
13.
If your vehicle is not equipped with ABS, when you brake hard on a slippery surface what may occur?
14.
In tractors and straight trucks spring brakes will come on fully when the air pressure drops to what range?
15.
What is a front brake limiting valve?
16.
When performing the controlled braking method for an emergency stop, you are _________.
17.
Vehicles with air brakes have pressure gauges connected to the _______.
18.
You can test whether the trailer air system is charged by:
19.
Drivers of doubles and triples must take into greater account:
20.
A visual inspection after coupling should show that: