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In Connecticut, anyone who wants to operate vehicles transporting liquids or gases in tanks whose individual capacity is larger than 119 gallons and whose aggregate capacity is at least 1,000 gallons must obtain a Tanker (N) endorsement on their Commercial Driver’s License (CDL). This endorsement is added to the CDL after passing a tanker endorsement knowledge test and a skills test in a vehicle of the license class you are applying for. If you plan to transport hazardous liquids or gases, you’ll need both the Tanker (N) and HazMat (H) endorsements, sometimes referred to together as an X endorsement.
Practice makes perfect, and this principle also applies to the special skills needed to operate tank vehicles. As you log more hours behind the wheel of a tanker, you’ll naturally gain more experience. Nobody is born with excellent driving skills. While it is useful for singing or acting, a natural talent for hauling cargo across the states does not exist.
It all starts in the learning phase, where aspiring commercial drivers build the foundation for their careers. During this time, you will study the official 2026 CDL manual (Connecticut CDL Handbook 2026) which explains this endorsement in detail. However, most students find the material too complex and difficult to study. As they search for more convenient alternatives, they find online resources to reinforce their freshly formed foundation.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
Our Connecticut DMV CDL Tanker endorsement practice tests can help you pass the knowledge exam on your first try. Train on them for several weeks, and you’ll naturally see how your score improves with more practice. It is recommended to disregard your score during your first few attempts when you are more likely to fail. A failing score shouldn’t discourage you at this early stage. Instead, you should pay attention to the detailed explanation provided after every question. Students love the immediate feedback feature because they don’t have to wait until the end of the test to identify their mistakes.
There’s no limit on how often you can use our practice tests. With unlimited attempts, you can even create a daily routine revolving around training for the official written exam. Once you consistently obtain passing scores, you can take the official knowledge exam with the reassurance that the experience will be similar to your training sessions.
Driver’s Ed is - nobody wants to set foot inside the DMV. 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 CT 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 DMV.
