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From the rolling hills of the Ozarks to the bustling streets of St. Louis and Kansas City, Missouri has much to offer those who want to explore its beautiful landscapes. However, as a truck driver, you are responsible for safely transporting your cargo, which can sometimes be hazardous. There’s no time to admire the scenery while you are passing through winding roads in a fully loaded tanker. Tanker trucks have a higher center of gravity and liquid surge can make handling more difficult than what you’re used to in your personal vehicle.
Anyone who wants to drive tankers in Missouri must obtain the Tank Vehicles (N) endorsement on their Commercial Driver’s License (CDL). Depending on the job you are applying for, you might also need a HazMat (H) endorsement. It allows you to transport hazardous materials such as gasoline, pesticides, toxic chemicals and even jet fuel. Combined together, these two endorsements are often referred to as an “X” endorsement, which puts you at a significant advantage in your field.
Although you are embarking on a long and challenging journey, it is also a rewarding one. Before you can get behind the wheel of an actual tanker, you must learn the various aspects of the Tank Vehicles endorsement. Your main point of reference will be the official 2026 CDL manual (Missouri CDL Handbook 2026), which contains essential information on commercial driving (including the safe operation of tanker vehicles).
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
To maximize your chances of passing the official Tank Vehicles knowledge exam (which is required for obtaining a Tank Vehicles endorsement), you should train on our Missouri CDL Tanker Endorsement practice tests. Current for January 2026, these practice tests have several useful features. Our automated assistant will be present during your training sessions, ready to assist you with hints, real-life examples, and comprehensive explanations.
Once you begin a practice session, you will notice a general overview on the upper-left side of the screen. It displays the total number of questions, how many questions you’ve gotten right and how many more mistakes you can make before you fail. While you need to score at least 80% to pass, we recommend ignoring this requirement while you are still in the learning phase. Instead, you should learn from your mistakes and memorize the correct answers.
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 2026 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.
