Prepare for your CDL General Knowledge test with focused practice based on the topics commercial drivers are expected to understand.
CDLPrepUSA includes 175 General Knowledge practice questions, with immediate answer feedback and progress tracking so you can study at your own pace.
Start Practicing General Knowledge
Try 5 questions free. No purchase required to start.
The General Knowledge test covers the core safety knowledge needed to operate a commercial motor vehicle. It is the basic CDL knowledge test taken by CDL applicants, while additional tests may be required depending on the type of vehicle you plan to drive and the endorsements you need.
Federal CDL standards establish minimum knowledge-testing requirements, but states administer their own CDL programs and tests. FMCSA recommends preparing with the CDL manual issued by your state.
General Knowledge preparation covers a broad range of commercial-driving fundamentals, including areas such as:
CDLPrepUSA's General Knowledge bank includes 175 practice questions.
Work through the questions at your own pace, review incorrect answers, and continue where you left off when you return.
You can start with 5 free practice questions before deciding whether you want access to the complete General Knowledge exam.
See whether your answer was correct and review the explanation before moving on.
Your account keeps your study progress so you can pick up where you left off.
CDLPrepUSA is available in 19 languages.
Federal CDL standards require applicants to answer at least 80% of knowledge-test questions correctly. Individual states administer the tests and may differ in the total number of questions and other procedures.
Federal standards require the basic knowledge test to contain at least 30 questions, but the exact number used by your state can vary. Check your state's current CDL manual or licensing agency for the format you'll encounter.
Use CDLPrepUSA to work through General Knowledge questions, review your answers, and track your progress as you prepare for test day.
Start Practicing General Knowledge
5 free questions to get started.
The General Knowledge test is the basic knowledge test for CDL applicants. Depending on the vehicle and driving work you plan to do, you may also need additional knowledge tests such as Air Brakes, Combination Vehicles, Passenger, HazMat, Tank Vehicles, Doubles/Triples, or School Bus.
Federal standards require a score of at least 80% on CDL knowledge tests.
Federal standards require at least 30 questions on the basic knowledge test. The exact number and testing procedure can vary by state, so check your state CDL manual for current details.
CDLPrepUSA currently includes 175 General Knowledge practice questions. You can try 5 questions free before unlocking the complete question bank.
Yes. CDLPrepUSA is designed to help you practice and reinforce what you study, not replace your official state CDL manual. FMCSA recommends using the CDL manual issued by your state when preparing for CDL testing.
CDLPrepUSA is an independent study and practice service and is not affiliated with or endorsed by FMCSA, any state DMV, or other government agency. Test requirements and procedures can vary by state. Always consult your state's current CDL manual and licensing agency for official requirements.