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.
You are driving a 100-foot truck with double trailers at 30 mph. The road is dry, and visibility is good. You should keep at least ______ seconds of space ahead of you.
2.
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
3.
You will test that the trailer service brakes are working by:
4.
You want to hook your combination to a second trailer that has no spring brakes. To do this without wheel chocks you should:
5.
The trailer air supply control should pop out when the air pressure falls into the pressure range of:
6.
Air tanks need to be drained ______.
7.
Automatic air tanks _______.
8.
Pushing the brake pedal down when the spring brakes are on could _________.
9.
What distinguishes a wedge brake from other types of brakes?
10.
A danger of a malfunctioning tractor protection valve is:
11.
When driving doubles or triples, for safer handling which trailer should be at the rear?
12.
Wedge brakes and disc brakes are ______ than s-cam brakes.
13.
When checking that air is flowing to all trailers, what is used to provide air to the supply lines?
14.
When you need to apply more pressure to help your brakes work normally effectively, this means that your brakes are fading. Which of the following can cause fading brakes?
15.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
16.
Why should air tanks be drained completely?
17.
When you make an emergency stop, you should _________.
18.
To apply the parking brakes, you should _______.
19.
Why do some air brake systems have an alcohol evaporator?
20.
When inspecting doubles and triples shut-off valves, which of the following is true?