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 a modulating control valve?
2.
What is the function of an "application pressure gauge"?
3.
Which is true when checking air flow to all trailers?
4.
When driving a truck with more than one trailer, which trailer should be first behind the truck?
5.
Air brakes take longer to stop than hydraulic brakes because _______.
6.
When testing the coupling of the double trailer, the landing gears of the rear trailer should be:
7.
Automatic adjusters should ________.
8.
You should check trailer height before connecting a converted dolly to a second or third trailer. The trailer height is right when:
9.
On older vehicles, a low air pressure warning signal comes on at what psi?
10.
Brake linings should not be _______.
11.
The service brake system ________.
12.
When the safety valve releases air this indicates ___________.
13.
A safe speed on a curve for a smaller commercial vehicle:
14.
It's important that a warning signal comes on before the air pressure in the tank falls below _______.
15.
What affects the stopping distance for air brakes?
16.
You are doing a walk around inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _________.
17.
Why is it so crucial to drain your vehicle's air tanks at the end of each day of driving?
18.
To position the converter dolly over short distances you can:
19.
If the malfunction lamp stays on after the bulb check, __________.
20.
The pintle hook should never be unlocked when: