Expert-built Prep Products for General Knowledge, Air Brakes, Passenger, Tanker, HazMat.
100 in-depth questions on passenger safety, inspections, emergency scenarios, and passenger handling.
Master Vehicle Inspection, Basic Control Skills, and Road Test requirements for your CDL.
Expert knowledge of air brake systems to secure more rewarding commercial driving positions.
CDL Hazardous Materials exam prep designed to help you pass the first time.
Comprehensive coverage of tanker regulations, safety protocols, and realistic practice.
The Commercial Driver's License (CDL) knowledge test is a written exam required by every state for anyone who wants to operate commercial motor vehicles. Whether you're pursuing a Class A, B, or C license — or adding endorsements for HazMat, Passenger, Tanker, or Air Brakes — the knowledge test is your first hurdle before the skills test.
The CDL exam covers topics defined by the FMCSA, including vehicle inspection, basic control, safe driving practices, air brake systems, and endorsement-specific regulations. First-time pass rates vary by state but typically fall between 50% and 70%, which means nearly half of test-takers fail on their first attempt. The most commonly failed sections are Air Brakes and HazMat, where precise knowledge of PSI thresholds, stopping distances, and hazardous materials classifications is required.
Kaplan's CDL Prep Products are built by commercial driving education experts and organized by endorsement so you study exactly what your test covers. Each product includes hundreds of practice questions that mirror the format and difficulty of the actual exam, with detailed answer explanations that teach the reasoning behind every correct response. At $29 per product, Kaplan delivers professional-grade exam prep at a fraction of the cost of classroom courses or paid CDL schools.
