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Free Arizona CDL Combination Practice Test 2025
Part of mandatory Entry-Level Driver Training Course Based on 2025 AZ commercial driver's license manualAvailable in EN, ES
25questions
5mistakes allowed
80%passing score
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.
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 2025) 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, 2025. 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.
Perfect for
- First-time AZ CDL and CLP applicants
- CDL holders adding endorsements
- AZ CDL renewal applicants
What to expect on the actual exam
| How many questions | 20 |
|---|---|
| How many correct answers to pass | 16 |
| Passing score | 80% |
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List of questions (classic view)
- After you lock the kingpin into the fifth wheel, how should you check the connection?
- After you connect the air lines but before you back under the trailer, you should
- Which statement best illustrates the "crack-the-whip" effect?
- When you inspect the landing gear after uncoupling the trailer, where should the tractor be?
- What is the safest way to turn right from a two-way road?
- To drive a triple combination vehicle, you must have
- To prevent a rollover, cargo should be
- Combination vehicles take longer to stop when they are empty than when they are fully loaded, because
- If your vehicle gets stuck on a railroad track, you should
- Low-slung vehicles can be risky at railroad crossings because
- On a double or triple vehicle, which wheels offtrack the most?
- When you're pulling doubles or triples, the shut-off valves should always be
- On a trailer, where is the yellow antilock brake (ABS) malfunction lamp located?
- Even before antilock braking systems (ABS) were required, some vehicles already had them. How can you check if your vehicle has ABS?
- An antilock braking system (ABS) is useful
- After coupling, make sure that the air lines are not crossed. How should you do this?
- During uncoupling, you should disconnect the electrical cable and
- Before you start to uncouple, you must
- You can confirm that air is going to all brakes in your trailers by
- To uncouple a loaded trailer, after the landing gear has made firm contact with the ground, you should
- If the trailer has antilock brakes (ABS) but the tractor doesn't,
- To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and
- If your test of the tractor protection valve is successful,
- The tractor protection valve is designed to close automatically if the air pressure falls into the pressure range specified by the manufacturer, typically
- As part of your vehicle inspection test, if your vehicle is equipped with air brakes and has a trailer, you will inspect the air connections between the truck or tractor and the trailer. Make sure that the ________ are locked in place and free of damage or air leaks.
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