Free OR CDL Double/Triple Trailers Practice Test 2025

Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
Based on 2025 OR commercial driver's license manual
Triple-checked for accuracy
Updated for March 2025

From the coastal and forested areas of the west to the mountainous terrain of the Cascades, you’ll see a good mix of terrain as you drive in Oregon. If you add the Double and Triple Trailer endorsement to your Oregon Commercial Driver’s License (CDL), you’ll unlock valuable new marketability and earning potential in the transport industry! This endorsement permits you to take on more types of transport jobs and immediately elevates you in the market. To get started, you’ll need to pass a 20-question multiple-choice knowledge test with a score of 80% (16 correct answers). Since this is an addition to your CDL, you’ve already done the heavy lifting. Once you pass this knowledge test, you’ll receive the “T” endorsement on your CDL, authorizing you to pull two or three trailers (where allowed) (Oregon CDL Handbook 2025).

In the Beaver State, you must be at least 18 years of age to add this certification to your CDL, but the age requirement to travel across state lines is federally mandated at 21 or older. Triple trailers are indeed allowed in Oregon; however, state law prohibits exceeding a maximum length of 105 feet for any combination vehicle. Double and triple trailers are used throughout Oregon for the transport of timber products (lumber, plywood, and paper), agricultural products (especially fruits, vegetables, nuts, wines, and dairy), technology and electronics (Portland is a major hub), manufactured goods and machinery, and seafood from the Pacific Ocean coastline. So, how can you best study for this test?

When preparing for your test, it’s exhausting looking at the massive volume of information online. Our online Oregon CDL Double/Triple Trailers Endorsement practice test simplifies this by offering a targeted, structured approach. Up to date as of March 2025, it includes 20 multiple-choice questions in the same format that you’ll encounter at the DMV on your test day! You’ll receive real-time feedback for each question, which has been shown to increase retention by avoiding the pile-up of end-of-test feedback you might receive elsewhere.

Remember: You only need to pass the official knowledge test. Once you’ve studied, practiced with our free tests, and feel prepared, then it’s time to head over to the DMV. Documents in hand, you’ll pay the fee, pass the test, and significantly level up your transport opportunities.

6 min to complete

Available in EN and ES

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What to expect on the actual OR DMV exam

questions

correct answers to pass

80%

passing score

Helpful links

OR DMV website

Official Oregon CDL manual (2025)

More OR DMV Written Exam Resources

OR CDL Double/Triple Trailers Test (you are here)

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Written by Andrei Zakhareuski Updated over a week ago

At Driving-Tests.org, we understand the importance of reliable and accurate practice tests to help you prepare for your DMV exam. That's why we've developed a meticulous process to create and continually update our practice questions, ensuring they reflect the most current driving laws and regulations.

Here's an inside look at how we maintain the highest quality in our practice tests.

Content Creation and Verification Process

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Our thorough quality control process ensures that you have access to practice tests that are as accurate and up-to-date as possible. We believe in the power of well-prepared drivers and are dedicated to providing you with the best study tools to help you succeed on your DMV exam.

FREE OR CDL Double/Triple Trailers Practice Test

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