Free Oregon CDL Double/Triple Trailers Practice Test 2023

Do you know how to pair double or triple trailers? If you are planning to take the Oregon CDL double/triple trailer endorsement test, make sure to know it! Our Oregon CDL Practice Test has the same questions as the real exam which is based on the Oregon 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 Oregon 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 OR commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
OR CDL Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
The part of the combination vehicle most likely to turn over is the:
What is the "cut-in" pressure for most air compressor governors?
The braking power of the spring brakes ______.
On older vehicles, a low air pressure warning signal comes on at what psi?
When uncoupling twin trailers you should park:
If the rear trailer does not have spring brakes, disconnecting the emergency line after charging will:
Air tanks need to be drained ______.
How do you check the low pressure warning signal?
You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should:
If you want to couple a second trailer to your combination vehicle, secure it by using:
The tractor protection valve should pop out when air pressure falls to:
After coupling the converter dolly to the first trailer, the pintle hook should be:
When increased application pressure to maintain the same speed becomes necessary, you should ______.
Vehicles without automatic air tank drains need to be checked manually to remove ________?
Where is compressed air stored?
Which of the following is the most common reason brakes fade?
Why should you never leave your vehicle unattended without applying the parking brakes?
If the air compressor does not have its own oil supply, how is it lubricated?
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
Why should you not drive your vehicle if the air pressure does not build up quickly enough?