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 should you do when the low air pressure warning comes on?
2.
If air supply drops when driving, the tractor protection valve ________.
3.
You will test that the trailer service brakes are working by:
4.
After coupling, the air shut-off valves at the back of the first trailer should be:
5.
You should check trailer height before connecting a converted dolly to a second or third trailer. The trailer height is right when:
6.
You are driving a set of doubles and a set of trailer wheels goes into a skid. Which of these is most likely to occur?
7.
The air compressor should pump air starting at what psi?
8.
How do you check the low pressure warning signal?
9.
Air tanks need to be drained ______.
10.
What is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer?
11.
Before you can supply air to the air tanks of a second trailer you need to:
12.
During a normal drive, the spring brakes are held back by _____.
13.
If your vehicle is not equipped with ABS, when you brake hard on a slippery surface what may occur?
14.
In tractors and straight trucks spring brakes will come on fully when the air pressure drops to what range?
15.
Wedge brakes and disc brakes are ______ than s-cam brakes.
16.
Why should air tanks be drained completely?
17.
What does the air compressor governor control?
18.
Why should you drain water from compressed air tanks?
19.
The last step to uncouple a converter dolly is:
20.
A visual inspection after coupling should show that: