What is CDL Pass Master?
CDL Pass Master is a free practice test site for aspiring commercial driver's license holders. We provide 400 General Knowledge questions — each on its own page with a detailed explanation — to help you prepare for the federal CDL exam.
No account is required. No personal data is collected. Your progress is saved locally in your browser and never leaves your device.
FMCSA Reference
Our questions are aligned with the Federal Motor Carrier Safety Administration (FMCSA) regulations under §383.111 (Required knowledge), which outlines the topics every CDL applicant must demonstrate knowledge of, including vehicle inspection, basic control, safe driving practices, and more.
For the official rule text, visit the FMCSA §383.111 on eCFR.gov .
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Disclaimer
CDL Pass Master is not affiliated with FMCSA or any state DMV. This site is an independent study resource. Exam content varies by state. Always consult your state's official CDL manual and testing requirements before taking your exam.
The CDL Pass Master App
Need more than General Knowledge? The CDL Pass Master App covers all 6 endorsements with 1,000+ questions, mock exams, and adaptive drills. Lifetime access, no subscription.
Get the App →