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Chicago is one of the largest transportation hubs in the United States, with major tanker routes running through the I-55, I-80, and I-94 corridors. The Windy City offers plenty of opportunities to tanker drivers—companies like Schneider National, Crete Carrier, and numerous dairy haulers actively recruit drivers with the Tank Vehicles endorsement. Illinois also has many rural routes in the central and southern regions, where hauling agricultural liquids (milk, fertilizers, liquid feed) is common.
You must obtain a Tank Vehicles (N) Endorsement on your Commercial Driver’s License (CDL) to drive tankers transporting liquids or gases in tanks with individual capacity larger than 119 gallons and aggregate capacity of at least 1,000 gallons. Without this endorsement, you cannot legally haul liquid cargo—significantly limiting your job options and earning potential in Illinois’s thriving trucking industry.
What to expect on the official Illinois Tank Vehicles test:
This endorsement is granted after passing a Tank Vehicles knowledge test. As you begin your learning journey, familiarize yourself with the official 2026 CDL manual (Illinois CDL Handbook 2026).
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
Our CDL Tanker Vehicles Endorsement practice test, specific to Illinois, can help you pass on your first attempt. Consisting of 20 questions based on the CDL manual, each practice test features:
While there is no way to know exactly which questions you’ll get on the official test, consistent practice with our tests builds the knowledge and confidence you need to pass.
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 IL 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.
