Free South Dakota CDL Permit Practice Test: General Knowledge 2025

Welcome to our free South Dakota CDL permit practice test! Taking this practice test should help you pass the official CDL General Knowledge test. Have you started reading the official South Dakota Commercial Driver’s License Study Guide (South Dakota CDL Handbook 2025)? By taking this practice test, you’ll help absorb the relevant material from the official study guide and get used to being tested on it. The practice test is based on the official state CDL Study Guide, just like the official knowledge test. It’s up to date as of September, 2025 and has 50 multiple-choice questions. The questions on this practice test will assess your understanding of such topics as basic vehicle maneuvers, cargo management, emergency preparedness, and pre-trip inspections. Unlike the official knowledge test, however, this practice test is designed to help you learn. Each question comes with a hint and an explanation of the correct answer, and there’s an automated assistant for even more help.

By passing the official knowledge test, submitting to a medical examination, and meeting some other requirements, you’ll be eligible to obtain a Commercial Learner’s Permit (CLP). This credential will allow you to practice commercial driving under the supervision of someone who already holds a Commercial Driver’s License (CDL).

By practicing commercial driving, you’ll become sufficiently good at it to pass the official skills test, a necessary step for you to obtain a CDL. The skills test will evaluate your performance in basic vehicle maneuvers, a pre-trip inspection, and a road test.

There are three classes of CDLs: Class A is typically for large combination vehicles, such as semi-trucks and tractor-trailers. Class B is typically for larger single-unit vehicles, such as full-size buses and straight trucks, including box trucks and most dump trucks. Class C is typically for smaller commercial vehicles that transport hazardous materials or at least 16 occupants (including the driver), such as shuttle buses and small trucks carrying hazardous materials. Decide which class you want, based on the types of vehicles you expect to be driving commercially in your career.

Once you obtain a CDL and all the endorsements you need, you can start working as a commercial driver. The largest economic sectors in South Dakota are agriculture, the service industry (including retail, finance, and health care), government spending (primarily for defense), and tourism. The agriculture sector employs truck drivers to transport crops and livestock to various distribution hubs, perhaps even out of the country eventually. The state is home to several famous tourist attractions, including the Black Hills, Badlands National Park, and the Mount Rushmore National Memorial, creating a demand for bus drivers to transport tourists to these and other locations around the state.