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Several key economic sectors in Arizona employ drivers of semi-trucks and tractor-trailers. Here are some examples. The state’s most important agricultural products include citrus, cotton, and dairy, which are exported to the rest of the United States and worldwide. Long-haul truck drivers transport these products. The copper-mining sector is vitally important to the state’s economy. Trucks transport equipment to the copper mines and transport copper from them. Arizona also shares a border with Mexico, creating a demand for trucking jobs in cross-border trade with Mexico.
Major truck routes in Arizona include Interstates 8, 10, 17, and 40; U.S. Routes 60, 93, and 191; and State Routes 85, 87, 347, Loop 101, and Loop 202. However, truck drivers should watch out for extreme heat conditions in the summertime, when temperatures of over 110°F can cause tires to blow out or vehicles to overheat. They should also watch out for Arizona’s monsoon season (typically from June to September), with its dust storms, heavy rainstorms, and flash floods.
To drive commercial motor vehicles (CMVs), you must have a Commercial Driver’s License (CDL). There are three classes of CDLs: Class A, Class B, and Class C. To drive semi-trucks or tractor-trailers, you must obtain a Class A CDL. This class of CDL allows you to drive any combination vehicle whose gross combined weight rating (GCWR) is 26,001 or more pounds and the gross vehicle weight rating (GVWR) of the towed unit is 10,001 pounds or more.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
To get a CDL of any class, you must meet a number of requirements. One of them is to pass the official written knowledge test on the general theory of commercial driving. But to drive combination vehicles with a Class A CDL, you must also pass the Combination Vehicles knowledge test on the theory of operating combination vehicles. That’s likely while you’re here. You’re concerned that just reading the official Arizona Commercial Driver License Manual (Arizona CDL Handbook 2026) may not give you enough grasp of the subject to enable you to pass the Combination Vehicles knowledge test. (We hope you didn’t learn that lesson the hard way.)
This free Arizona CDL Combination practice test is based on the above study guide, just like the official knowledge test. It’s up to date as of January, 2026. It has 25 questions and answers that address such topics as safe driving techniques, combination brakes, and coupling and uncoupling. Unlike the official knowledge test, each question comes with a helpful hint and an explanation of the correct answer. This practice test isn’t timed; take your time and learn as much as you can from the experience.
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Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.
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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 AZ 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 MVD.
