🚛

CDL — Commercial Driver's License

Free CDL practice for the commercial driver's license knowledge tests, with Chinese & Spanish explanations and an English-term glossary. The real CDL test is in English, and federal rules (FMCSA, 49 CFR 391.11) require English proficiency to drive commercially.

English中文Español

Real test language: the official CDL — Commercial Driver's License is given in English.

CoverageFederal examQuestions595+

🎯 Start practicing

🚛

CDL General Knowledge

10 topics

🎯 Start Practicing →⏱️ Mock Exam →

🛑

CDL Air Brakes

6 topics

🎯 Start Practicing →⏱️ Mock Exam →

🚛

CDL Combination Vehicles

5 topics

🎯 Start Practicing →⏱️ Mock Exam →