Need a final study-spree? This California CDL Passenger Vehicles Marathon is a super-challenging study tool that contains a mix of all 67 questions that we have available for this CA endorsement. If you make a mistake, we’ll remember that question and will display it to you again at the end of the exam until you’ve answered that question correctly. In other words, the Marathon will cycle through your missed questions until you answer each one correctly. You must make a 100% to pass. We suggest you attempt this one after you have practiced the state’s “regular” tests, but before the “Exam”. Give it your best shot!