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CDL General Knowledge Practice Test -3

Need to Pass your CDL General Knowledge Test! Then start here with FREE Practice Tests for Commercial Drivers. Our practice tests are designed to help you learn the material in the CDL Handbook, Each question is multiple choice and will provide instant feedback.
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CDL General Knowledge Practice Test

Pass your CDL exam with flying colors with help from our FREE online practice test for commercial drivers! Prep for all of the federal and state-specific information you’ll need to know to earn your commercial driver’s license, including traffic laws, safe operating maneuvers, emergency procedures, sharing the road, and more.

This free CDL practice test was expertly designed to help you learn quickly and efficiently, with the most up-to-date information pulled directly from the CDL manual—the same one your state uses to create your exam—and the latest FMCSA guidelines. Multiple-choice questions mimic the structure of the real test, with detailed explanations included with each answer for additional context. You’ll get real-time feedback on your progress, which you time by helping identify specific topics that need further study. Take our free CDL knowledge test as many times as you need to feel confident, and earn your CDL without any stress!

CDL General Knowledge Practice Test FAQs:

What questions are on the CDL knowledge test?

The CDL knowledge test questions include understanding the operating and safety components of your specific commercial vehicle (based on license class and/or endorsement), as well as how to maneuver that type of vehicle (turning, braking, etc.). You’ll also be quizzed on your state’s traffic laws and safe operating guidelines, such as sharing the road and right-of-way laws, speed limits in your state, and more.

How do I get a CDL in my state?

To get a CDL in your state, you must meet your state’s age requirements—typically, you’ll need to be at least 18 years old (21 years old if you plan to drive across state lines). You must first earn a commercial learner’s permit (CLP) and complete a commercial driver training course in order to practice driving. You’ll then take a behind-the-wheel road test in the type of vehicle you plan to drive with your CDL; this test also includes a pre-trip inspection where you’ll demonstrate your knowledge of the working and safety components of the vehicle. Though all states differ slightly in their processes, all follow this same general outline for a commercial driver’s license.

What tests are required to earn a commercial driver’s license?

To earn a CDL, you’ll need to pass the general knowledge exam, a behind-the-wheel road test, and a safety inspection test. You’ll also need to pass written and practical exams for any specific CDL endorsements you may be applying for, if any.

CDL Sample Test Questions

As a driver hauling cargo, you are responsible for ______.
  • Knowing your cargo is secured properly.
  • Inspecting your cargo.
  • Recognizing when your vehicle is overloaded.
  • All of the listed answers.
Blocking is used in the __________ of a piece of cargo to keep it from sliding.
  • Front.
  • Sides.
  • Back.
  • All of the listed answers.
If your privilege to operate your personal vehicle is revoked, you will _________.
  • Have to maintain superb CDL driving record.
  • Lose your CDL driving privileges.
  • Never be able to obtain any kind of license.
  • None of the listed answers.
It will take a typical tractor unit at minimum how many seconds to clear a single track of a railroad crossing?
  • 20 seconds.
  • 14 seconds.
  • 5 seconds.
  • 8 seconds.
Motorists who fail to maintain normal speeds are hazards. There are some vehicles that cannot reach very high speeds and seeing them is a hazard clue. Which of the following is that type of vehicle?
  • Mopeds.
  • Farm machinery.
  • Construction machinery.
  • Tractors.
  • All of the listed answers.


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