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  • Updated for January 2025
  • Based on 2025 CA commercial driver's license manual

CA CDL General Knowledge Exam Simulator 2025

Before heading to the California DMV to take the General Knowledge exam to receive your Commercial Driver’s License there are a few things you’ll want to consider. How much do you know about escape ramps or how to assess the proper following distance behind another vehicle? Whatever you think you already know, you’ll want to check your knowledge against the official California Commercial Driver’s Manual and take some practice tests to hone your answers. The exam can be tricky and you only have an hour to answer the 50 questions. Get just 10 wrong and score below an 80% and you are looking at another trip to the DMV on another day. If you want to avoid multiple trips, you also need to be ready with all the qualifying paperwork. Are you medically fit to drive a commercial vehicle? You’ll have to prove it with a certificate from a licensed medical examiner, as listed on the Federal Motor Carrier Safety Administration (FMCSA) National Registry. Certificates last two years unless you have a condition that needs monitoring, like high blood pressure. Then you also need to have proof of citizenship or permanent residency. Your social security card or birth certificate will be sufficient. Then you’ll also need to make sure you have a valid driver’s license. With all that together, and your developed knowledge of escape ramps, you’ll be all set. Start your journey today with our CA CDL General Knowledge Practice Test!

  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
This test is a Premium member exclusive. You'll get

All 650 exam-like questions specific to California

Interactive learning with AI personal tutor

Unique 360° Virtual Road Simulations

Get your money back if you don’t pass

About this test

5 min to complete
Available in EN and ES
Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.

What to expect on the actual CA DMV exam

50

questions

40

correct answers to pass

80%

passing score

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Since our foundation in 2010, Driving-Tests.org has led the way in online driver's education, with over a decade of experience. Our dedicated experts, bringing together more than 50 years of collective expertise, have established us as the largest non-governmental organization in the U.S. solely focused on driver education. We go beyond the official manuals, offering unique interactive experiences and support like audio guides and an AI Assistant, to cater to different learning styles and needs.
Helping hundreds of thousands to ace their tests, our resources have earned a 4.7-star rating from over 14,500 reviews. Our goal is to make your path to becoming a confident driver as straightforward and effective as possible.
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