Free CDL Cheat Sheet
The top 50 most important CDL test questions with answers and explanations. Pick your state, study the cheat sheet, and pass your CDL exam.
Last verified: November 2026 · FMCSA-compliant content
California CDL Cheat Sheet
Top 50 most important CDL questions with answers
Loading cheat sheet...
What's on the CDL Cheat Sheet?
Our CDL cheat sheet contains the 50 most frequently tested questions from the General Knowledge CDL exam. Each question includes the correct answer and a brief explanation of the concept. The cheat sheet is state-specific — select your state to see questions tailored to your DMV's test format.
The cheat sheet covers essential CDL topics including vehicle inspection, safe driving practices, air brake systems, hazard perception, speed management, night driving, and more. These are the concepts that appear on virtually every state's CDL General Knowledge test.