South Dakota CDL Practice Test 2026
The South Dakota CDL knowledge test covers 50 questions on commercial vehicle operation, safety regulations, and pre-trip inspections. A 80% score is required to pass. Start with a free CDL practice test to gauge your readiness.
Updated February 2026
How we help you prepare
259 practice questions to help you master the South Dakota CDL Test, 4 practice tests, 1 exam simulation
South Dakota requirement to pass
50 questions on the real test, 80% passing score (40 of 50), no time limit
Study by Category
Master each topic before your South Dakota written test. 4 categories are free to start.
Practice Runs
Complete practice runs to test your knowledge. Runs 1-2 are free.
Test 1: General Knowledge
Road signs, traffic signals, right-of-way, speed limits
Test 2: Road Rules & Signs
Regulatory signs, warning signs, lane markings, intersections
Pro Study Tools
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The South Dakota CDL knowledge test has 50 multiple-choice questions. You need 40 correct answers (80%) to pass. There is no time limit. Tests are administered by the DPS. Questions cover commercial vehicle operation, safety regulations, and road signs, traffic laws, and South Dakota-specific rules. Read how DMV IQ prepares you for test day.
About the CDL Knowledge Test
To obtain a Commercial Driver's License in South Dakota, you must first pass the CDL general knowledge written test administered by the DPS. The general knowledge exam consists of 50 multiple-choice questions covering vehicle inspection, basic control, safe driving, transporting cargo, and federal regulations. A score of 80% or higher (40 correct) is required to pass.
CDL Classes and Endorsements
South Dakota issues three CDL classes. Class A covers combination vehicles over 26,001 lbs GVWR when the towed unit exceeds 10,000 lbs — this is what you need for tractor-trailers and most heavy hauling. Class B covers single vehicles over 26,001 lbs such as straight trucks, large buses, and dump trucks. Class C covers vehicles designed for 16+ passengers or those carrying hazardous materials that don't meet Class A or B criteria.
Beyond the general knowledge test, you may need additional written tests for endorsements: Hazardous Materials (H), Tanker (N), Passenger (P), School Bus (S), Doubles/Triples (T), or the combined HazMat-Tanker (X). Each endorsement requires its own written exam, and HazMat also requires a TSA background check.
Entry-Level Driver Training (ELDT)
Since February 2022, federal law requires Entry-Level Driver Training (ELDT) through an FMCSA-registered training provider before you can take the CDL skills test for a Class A or B CDL. ELDT is also required before adding Hazardous Materials, Passenger, or School Bus endorsements. This applies in South Dakota and every other state.
Where to Take the Test
The CDL knowledge test is taken at any South Dakota DPS driver exam station. Appointments are required — Appointments required for knowledge tests. The test is available in English, Spanish. Results are delivered immediately — pass/fail displayed on screen after completing the test.
Preparing for Your CDL Test
The CDL test draws from the South Dakota CDL Manual and the federal Motor Carrier Safety Regulations. Key topics include pre-trip vehicle inspection procedures, air brake systems, coupling and uncoupling, cargo securement, hours-of-service rules, hazard perception, and accident procedures. South Dakota-specific regulations on weight limits, required permits, and designated truck routes may also appear.
Taking practice tests before your appointment is one of the most effective ways to prepare. Focus on understanding road signs and the concepts behind each question rather than memorizing answers — the real test may phrase questions differently than what you studied.
Retake Policy
Can retake the next business day. After 3 failed attempts within 6 months, must reapply and pay all fees again.
Try It Yourself
Get a taste of the study experience. Answer a real question or preview the timed exam simulator.
Sample Flash Card
What is the CDL disqualification period for a first DUI offense while operating a commercial vehicle in South Dakota?
Try all 4 free practice runs
Start Practicing →When approaching a school zone during school hours, the maximum speed limit in South Dakota is:
Exam Simulator
Timed, 50-question test that mirrors the real South Dakota DMV exam. 80% to pass.
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The IQ Readiness Score™ measures six dimensions of test readiness and estimates your probability of passing the South Dakota exam.
Frequently Asked Questions
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