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.
What is the purpose of an antilock braking system (ABS)?
2.
What is the purpose of a front-brake limiting valve?
3.
What is proper braking technique for drivers travelling down a hill or any other downgrade?
4.
If air supply drops when driving, the tractor protection valve ________.
5.
The braking power of the spring brakes ______.
6.
A front brake limiting valve ______.
7.
If the dolly has spring brakes, release them with:
8.
When driving doubles or triples in adverse or slippery weather conditions, all of the following are true except:
9.
What is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer?
10.
Before you can supply air to the air tanks of a second trailer you need to:
11.
During a normal drive, the spring brakes are held back by _____.
12.
You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should:
13.
Letting up on the brake pedal _______.
14.
Why should you never leave your vehicle unattended without applying the parking brakes?
15.
Which of the following is the most common reason brakes fade?
16.
If you have manual transmission _________.
17.
Water and oil _______.
18.
The last step to uncouple a converter dolly is:
19.
When uncoupling the rear trailer, which of these should be done first?
20.
A converter dolly is used: