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With our previous practice tests, you began learning the essential skills to tow multiple trailers. Our third free Missouri DOR Double/Triple Trailer endorsement practice test continues helping you develop a firm grasp of those skills. The days of the Pony Express in St. Joseph have long since passed, but the transportation industry is alive and well. Adding a “T” endorsement, allowing you to pull multiple trailers, to your Missouri commercial driver’s license (CDL) can increase your earnings and driving opportunities. The practice test can help you obtain this endorsement with a stress-free training method that accelerates your learning process.
Chief Educational Researcher, Driving‑Tests.org (ACES member)
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Each of the 20 questions on this Missouri DOR CDL Double/Triple Trailer Endorsement practice test is designed to help you build a strategic study plan. Before you can be issued a “T” endorsement on your CDL, you must pass an official knowledge test. You are required to correctly answer at least 80% of the 20 questions on the official knowledge test to pass. The practice test uses questions, similar to those on the official knowledge test, to identify your most significant knowledge gaps and directs you to the information to fill them.
Using our Missouri DOR CDL Double/Triple Trailer endorsement practice test, you will receive immediate access to the crucial information you must better understand. Unlike the practice test, traditional study methods, such as study guides, train you to memorize the answers to a series of questions and won’t help you correct your misconceptions. As a result, you are likely to become stalled in your progress and left to consult additional resources for the required information. You won’t need to worry about finding yourself in these situations with the practice test because it is interactive and provides feedback on your incorrect answers. If you submit an incorrect answer, the practice test responds with a thorough explanation of the correct one. The practice test takes this information directly from the most recent Missouri DOR CDL manual (Missouri CDL Handbook 2025) and is up to date as of December 2025. You can trust the accuracy of the information provided, confidently apply it to various driving scenarios, and increase your chances of passing the official knowledge test on your first try.
Visiting Elephant Rocks State Park is a memorable experience, and you can develop remarkably professional driving skills to be remembered for years to come with the practice tests at https://driving-tests.org/missouri/mo-cdl-practice-test/.
Driver’s Ed is - nobody wants to set foot inside the DOR. That’s why millions of learners trust us for simple, visual, effective prep.
We are an officially recognized FMCSA Entry-Level Driver Training provider and a proud partner to over 2,500 libraries. We work with safety organizations like GHSA and the National Safety Council to help create safer roads for everyone.
Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.
Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.
Go beyond the boring black-and-white manual. Our interactive handbook lets you read, listen with an MP3 audio version, or even chat with it to find the information you need, faster.
We build our practice questions from the current 2025 MO Driver Handbook and refine them using patterns recent test‑takers report.
Driver handbook • Knowledge‑test/permit overview • Fees & ID requirements • Office/appointment info
We mirror recurring themes (e.g., right‑of‑way traps, sign look‑alikes) and use similar distractors and wording styles.
We don’t collect or publish actual test items and we’re not affiliated with DOR.
