Free CDL practice
Practice commercial driving knowledge topics with original questions and explanations before reviewing your official CDL manual.
Free CDL Practice Test
Practice commercial driving knowledge topics for CDL general knowledge, Class A, Class B, Class C, vehicle inspection, air brakes, endorsements, and safe driving.
Class A CDL
Choose your state and review Class A CDL topics for combination vehicles, tractor-trailers, inspections, and safe driving.
Class B CDL
Choose your state and review Class B CDL topics for large single vehicles, inspection, control skills, and safe driving.
Class C CDL
Prepare for Class C CDL topics tied to passenger or hazardous-materials rules where applicable.
What to study first
Vehicle inspection, Basic vehicle control, Safe driving, Air brakes overview, Combination vehicle awareness, Cargo safety, Hazard perception, Railroad crossings, Speed and space management, Distracted and impaired driving, Emergency procedures, Trip planning and documentation
Free CDL practice
Question 1 of 7
Commercial Driving TestVehicle inspectioneasy60s
During a commercial vehicle inspection, why should a driver check tires, lights, mirrors, and fluid leaks before operating the vehicle?
Civil Service Exam University provides independent commercial driving test practice and study guidance only. It is not affiliated with FMCSA, any state DMV, CDL testing office, or motor vehicle agency. CDL classes, endorsements, medical certification, Entry-Level Driver Training rules, fees, documents, testing steps, and handbook updates vary by state and may change. Always verify current requirements with FMCSA and your official state CDL licensing agency.