Free South Carolina CDL Double/Triple Trailers Practice Test 2022

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 2022 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 "cut-in" pressure for most air compressor governors?
2.
What should you do when the low air pressure warning comes on?
3.
The air compressor governor stops air from pumping when it reaches the "cut-out" level or around generally _________.
4.
How do air-operated disc brakes work?
5.
On large buses low pressure warning devices usually signal at ______.
6.
When connecting converter dolly to the front trailer, support gear should be:
7.
With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. When you do this, you should hear:
8.
A low pressure warning signal could be __________.
9.
When you turn with the tractor/triple trailer combination, the wheels that off-track (cheat) the most are:
10.
To check if the converter dolly is securely coupled to the rear trailer you should:
11.
When coupling or uncoupling, trailer or dolly wheel should always be:
12.
When uncoupling twin trailers you should park:
13.
The most common type of foundation brake is?
14.
After coupling the converter dolly to the first trailer, the pintle hook should be:
15.
When testing the trailer emergency brakes, charge the system, pull out the trailer air supply control, and:
16.
Typically, air storage tanks hold enough air to allow the brakes to be used _______ even if the compressor stops working.
17.
If the air compressor does not have its own oil supply, how is it lubricated?
18.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
19.
Why should you never push the brake pedal down when the spring brakes are on?
20.
Where are the brake drums located?