Free Maine CDL Double/Triple Trailers Practice Test 2023

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 2021 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
What is a modulating control valve?
What is the function of a stop light switch?
The converter dolly air tank drain valve on coupled double/triple trailers should be:
When connecting converter dolly to the front trailer, support gear should be:
Air brakes take longer to stop than hydraulic brakes because _______.
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:
On older vehicles, a low air pressure warning signal comes on at what psi?
A front brake limiting valve ______.
Which of these statements about the handling of doubles and triples is true?
At 55 mph on dry pavement, the air brake lag distance is how many feet?
During normal operation, the brakes of the double/triple trailer are controlled by:
Letting up on the brake pedal _______.
If the air compressor has its own oil supply you should do what before driving?
Why should you never leave your vehicle unattended without applying the parking brakes?
When testing the trailer emergency brakes, charge the system, pull out the trailer air supply control, and:
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
Why should air tanks be drained completely?
A safe speed on a curve for a smaller commercial vehicle:
Water and oil _______.
A visual inspection after coupling should show that: