Free Missouri CDL Double/Triple Trailers Practice Test 2023

Do you know how to pair double or triple trailers? If you are planning to take the Missouri CDL double/triple trailer endorsement test, make sure to know it! Our Missouri CDL Practice Test has the same questions as the real exam which is based on the Missouri CDL Book. 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 Missouri 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 MO commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
MO CDL Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
What should you do when the low air pressure warning comes on?
What is a modulating control valve?
The air compressor governor stops air from pumping when it reaches the "cut-out" level or around generally _________.
When coupling or uncoupling, trailer or dolly wheel should always be:
Brake drums should not have cracks longer than what length?
If the rear trailer does not have spring brakes, disconnecting the emergency line after charging will:
During normal operation, the brakes of the double/triple trailer are controlled by:
Automatic air tanks _______.
If you want to couple a second trailer to your combination vehicle, secure it by using:
Before you can supply air to the air tanks of a second trailer you need to:
When checking that air is flowing to all trailers, what is used to provide air to the supply lines?
When testing the trailer emergency brakes, charge the system, pull out the trailer air supply control, and:
A safe speed on a curve for a smaller commercial vehicle:
To apply the parking brakes, you should _______.
If the air compressor does not have its own oil supply, how is it lubricated?
If the malfunction lamp stays on after the bulb check, __________.
Why is it so crucial to drain your vehicle's air tanks at the end of each day of driving?
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
Why should you not drive your vehicle if the air pressure does not build up quickly enough?
The pintle hook should never be unlocked when: