CDLCoach

CDL Coach helps you prepare for the U.S. Commercial Driver's License (CDL) knowledge test with English questions and clear Chinese explanations - built for bilingual learners. WHAT'S INSIDE - 470+ source-anchored practice questions across 10 modules: General Knowledge, Air Brakes, Combination Vehicles, Pre-Trip Inspection, HazMat, Tanker, Passenger, School Bus, Doubles/Triples, and Roadside English - Every question has an English prompt, a Chinese translation, and a bilingual explanation - 10 / 25 / 50-question mock exams - Automatic wrong-answer review and starred questions - Roadside-inspection English practice with built-in text-to-speech - A daily study plan based on your target module and timeline FREE TO START Practice General Knowledge and Roadside English for free. Unlock all 10 modules, full mock exams, and complete review with a one-time Pro Unlock, a Lifetime purchase, or a monthly subscription. Content is based on the federal (FMCSA) rules and the California Commercial Driver Handbook. CDL Coach is a study aid only - it is not affiliated with any DMV or the FMCSA, and does not guarantee exam results. Always confirm your state's current official handbook before testing.