CDL Mastery

CDL Mastery is a Chrome extension designed to help aspiring commercial drivers pass their CDL exams on the first attempt. It features a pool of 550+ practice questions drawn from official test content, a realistic practice test simulator with question randomization, and study sets of 10 to keep learning manageable. No registration is required, and the built-in immediate feedback highlights incorrect answers to reinforce learning.

It covers key CDL categories such as General Knowledge, Hazardous Materials, Passenger Vehicles, and Air Brake, among others, and supports state exams from AL through WY. Use CDL Mastery to practice anytime, track your progress with instant results, and feel confident on test day.