Free North 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 North Carolina CDL double/triple trailer endorsement test, make sure to know it! Our NC CDL Test has the same questions as the real exam which is based on the NC 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 North 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 NC commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
NC 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.
When coupling, correct trailer height should:
4.
To test the tractor protection valve, the engine needs to be:
5.
When driving a truck with more than one trailer, which trailer should be first behind the truck?
6.
In terms of stability, doubles and triples are:
7.
Brake linings should not be _______.
8.
Which of these statements about quick steering movements and doubles/triples is true?
9.
If the dolly has spring brakes, release them with:
10.
An air compressor can be cooled by _______.
11.
If you want to couple a second trailer to your combination vehicle, secure it by using:
12.
If the air compressor has its own oil supply you should do what before driving?
13.
Why should you check the brake adjustment often?
14.
What distinguishes a wedge brake from other types of brakes?
15.
When you make an emergency stop, you should _________.
16.
Why should you never push the brake pedal down when the spring brakes are on?
17.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
18.
Why do some air brake systems have an alcohol evaporator?
19.
Vehicles with air brakes have pressure gauges connected to the _______.
20.
A converter dolly is used: