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Free AZ CDL Pre-Trip Inspection Practice Exam 2025
Part of mandatory Entry-Level Driver Training Course Based on 2025 AZ commercial driver's license manualAvailable in EN, ES
20questions
4mistakes allowed
80%passing score
If you haven’t been a commercial driver before, you must obtain a commercial learner’s permit (CLP) before you can become qualified to obtain a commercial driver’s license (CDL). The CLP will allow you to practice operating commercial motor vehicles (CMVs) while supervised by a CDL holder. A crucial requirement for obtaining a CLP is to pass a set of knowledge tests for the class and type of vehicles you plan to drive. Regardless of the vehicles, however, all aspiring commercial drivers must pass the official General Knowledge test, which covers general commercial driving theory.
The official General Knowledge test covers a wide variety of commercial driving topics, including pre-trip inspections. (Federal regulations require the driver to be satisfied their vehicle is safe before driving it.) You will likely find some questions on pre-trip inspections, including defects or faults to look for in the vehicle’s systems and components. All questions on the General Knowledge test are based on the official Arizona CDL manual (Arizona CDL Handbook 2025). You should study the manual, but many drivers have found it hard to master commercial driving theory from the manual alone. If you feel you need more to learn the theory of pre-trip inspections, we can help.
This Arizona CDL Pre-Trip Inspection Practice Test is a great way to learn how to correctly answer the questions on pre-trip inspections on the General Knowledge test. Like the official knowledge test, this practice test is multiple choice. Each question comes with several answer options. You must choose the best or most complete answer. You can also get help from our AI assistant on any question. At your request, the AI assistant can explain the question in more depth, supply a hint, or answer your own questions about commercial driving theory. If you still miss the question, the AI assistant will immediately let you know and provide an explanation of the correct answer. With immediate feedback after every question, you won’t need to wait until the end of the test to know the correct answers.
The information you’ll learn through our pre-trip practice tests will do more than help you pass the General Knowledge test. It will also prove useful as you practice pre-trip inspections to pass the official skills test, which includes a test of your ability to conduct a proper pre-trip inspection.
Be sure to try our other Arizona CDL Pre-Trip Inspection Practice Tests, too!
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)
- What structure supporting the fifth wheel skid plate should be checked for cracks or breaks?
- You pump the pedal three times and hold it down for five seconds, making sure that the pedal does not move. What are you inspecting?
- What transmits power from the transmission to the drive axle?
- What carries air or hydraulic fluid to the wheel brake assembly?
- ________ are gas or hydraulic devices that cushion the vehicle's ride and stabilize the vehicle.
- What is the sliding mechanism and locking device for tandem axles on trailers?
- What do you inspect to make sure that all are present and show no signs of looseness such as rust trails or shiny threads?
- What should you check to be sure it is solid, clear of objects, and securely bolted to the tractor frame?
- What maintains air pressure in the air brake system?
- Which tires should have a minimum tread depth of 4/32 inch?
- Which of the following can disengage the engine from the drivetrain?
- What transforms steering column action into wheel action?
- Make sure that the _________ are not cut, chafed, spliced, or worn, and not tangled, pinched, or dragged against tractor parts.
- You are looking for puddles on the ground and dripping fluids on the underside of the engine and transmission. What are you checking for?
- What should be fully engaged with no loose or missing pins in the slide mechanism of the sliding fifth wheel?
- To improve visibility during severe or stormy weather, __________ must be secure, undamaged, and operating smoothly and correctly.
- _________ should be clean with no dirt, illegal stickers, obstructions, or damage.
- _________ are the brackets, bolts, or bushings that are used to attach the spring or air bag to the axle and vehicle frame.
- If the wheel has a sight glass, check that the oil level is adequate. Otherwise, look for leaks around the
- What releases the fifth wheel locking jaws so the trailer can be coupled?
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