Free Maine CDL Double/Triple Trailers Practice Test 2022

Do you know how to pair double or triple trailers? If you are planning to take the Maine CDL double/triple trailer endorsement test, make sure to know it! Our Maine CDL Practice Test has the same questions as the real exam which is based on the Maine 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 Maine 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 ME commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
ME 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 a modulating control valve?
2.
What is the "cut-in" pressure for most air compressor governors?
3.
Automatic slack adjusters ________.
4.
How do air-operated disc brakes work?
5.
To check if the converter dolly is securely coupled to the rear trailer you should:
6.
When you turn with the tractor/triple trailer combination, the wheels that off-track (cheat) the most are:
7.
The air compressor should pump air starting at what psi?
8.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
9.
If the dolly has spring brakes, release them with:
10.
A safety valve that releases air _______.
11.
What is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer?
12.
Before you can supply air to the air tanks of a second trailer you need to:
13.
An air compressor can be cooled by _______.
14.
A danger of a malfunctioning tractor protection valve is:
15.
Vehicles without automatic air tank drains need to be checked manually to remove ________?
16.
If the air compressor does not have its own oil supply, how is it lubricated?
17.
When performing the controlled braking method for an emergency stop, you are _________.
18.
Why is it so crucial to drain your vehicle's air tanks at the end of each day of driving?
19.
You can test whether the trailer air system is charged by:
20.
The last step to uncouple a converter dolly is: