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Drivers of combination trucks in the great state of Missouri can find profitable economic opportunities in several key economic sectors. Agriculture employs about 15% of the state’s workforce, producing beef, pork, soybeans, rice, and other agricultural products. There is also a thriving wine industry. Another significant economic sector is manufacturing, including aerospace, chemicals, trucks and vans, and food products. The high-tech sector, including biotechnology and information technology, is also growing. All these sectors depend on truckers to transport their products. In addition, some of these sectors – high-tech in particular – depend on truckers to deliver materials and equipment to them.
One of the busiest trucking routes in Missouri is Interstate 70, which runs from Utah to Maryland and connects St. Louis to Kansas City. Other major Interstate trucking routes include Interstate 35, which runs from Texas to Minnesota and connects Kansas City to Des Moines, Iowa; Interstate 44, which begins at Wichita Falls, Texas and connects Springfield to St. Louis, where it terminates; and Interstate 55, which runs from the Gulf of Mexico to the Great Lakes and connects St. Louis with Memphis, Tennessee.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
Want to drive combination vehicles on these roads for a living? By now, you’ve probably been working hard to obtain a Commercial Driver’s License (CDL), which will allow you to drive commercial motor vehicles (CMVs). That’s a huge step – but not the only step. To drive combination vehicles specifically, you must also pass the official Combination Vehicles knowledge test. It’s based on the official Missouri Commercial Driver License Manual (Missouri CDL Handbook 2025), which you’ve probably read. But if you could use more help to pass the knowledge test beyond what you’re getting from this study guide, we’ve got just the thing.
This free Missouri CDL Combination practice test is based on the official state CDL manual, just like the official Combination Vehicles knowledge test. It’s up to date as of December, 2025. It has 25 multiple-choice questions and answers on such topics as combination braking systems, combination driving techniques, coupling and uncoupling, and vehicle inspections. Unlike the official knowledge test, each question on this practice test comes with an available hint and an explanation of the correct answer. What this practice test doesn’t come with is a time limit. Take your time, not only to improve your chances of passing the test but also to learn as much as you can from the experience. For example, if you miss a question, you may want to pause the test and look up the information in the CDL manual before you proceed further.
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.
