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.
The part of the combination vehicle most likely to turn over is the:
2.
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
3.
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
4.
The air compressor governor stops air from pumping when it reaches the "cut-out" level or around generally _________.
5.
How do air-operated disc brakes work?
6.
Air brakes take longer to stop than hydraulic brakes because _______.
7.
The braking power of the spring brakes ______.
8.
When you turn with the tractor/triple trailer combination, the wheels that off-track (cheat) the most are:
9.
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:
10.
An air brake is made up of which of the following braking systems?
11.
When coupling or uncoupling, trailer or dolly wheel should always be:
12.
If the rear trailer does not have spring brakes, disconnecting the emergency line after charging will:
13.
The trailer air supply control should pop out when the air pressure falls into the pressure range of:
14.
How should the air leakage rate be tested?
15.
The tractor protection valve should pop out when air pressure falls to:
16.
What is a front brake limiting valve?
17.
Water and oil _______.
18.
In dual-air systems the pressure should build to _______.
19.
Why is it so crucial to drain your vehicle's air tanks at the end of each day of driving?
20.
To position the converter dolly over short distances you can: