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South Dakota CDL Class B Practice Test 2025

Average pass rate for CDL tests in South Dakota: 66%.
Average pass rate for this test: 51%.
Hard
9 min

The official general knowledge exam consists of 50 multiple-choice questions on various aspects of commercial driving theory. Aspiring commercial drivers must answer them all before the timer runs out. A minimum score of 80% is required to pass, leaving little room for error. On exam day, many students go to the DMV location prepared but still fail due to the pressure. They experience negative emotions such as anxiety and nervousness, which eventually impact their performance on the test.

To combat this problem, we have created the South Dakota CDL Class B Practice Test. This intuitive tool closely reflects the content and format of the official general knowledge exam, helping students prepare in advance. All 50 questions are based on the official South Dakota Commercial Driver License Manual (South Dakota CDL Handbook 2025). This comprehensive resource describes the various aspects of commercial driving theory in detail, including safe driving practices, pre-trip inspections, and the air braking system.

South Dakota CDL Class B Practice Test 2025
Commercial Driver's License
Based on the official SD CDL HandbookHandbook‑based (2025) + exam‑taker feedback
3 SD students practicing now
•8completed today
Steven Litvintchouk, M.S., Chief Educational Researcher at Driving-Tests.org

Authored and fact-checked by Steven Litvintchouk, M.S.

Chief Educational Researcher, Driving‑Tests.org (ACES member)

Last verified for accuracy on

Methodology & Editorial Policy

Real South Dakota drivers who passed first try

Verified student reviews • Shared with permission

Live in South Dakota, i bought this course in order to.
I live in South Dakota, i bought this course in order to obtain my cdl and air brakes test, I studied General Knowledge and air brakes, getting 70% on most my test. I reviewed all my missed questions and only got 2 wrong on my Written Test!
K
Driving-tests.org makes passing your tests so easy!
I had been studying for my CDL learners permit test. I had used other CDL pratice test sites but none of them really helped me pass my tests. I signed up for the life-time membership to driving-tests.org and it made all the difference. I was down to my last chance to pass my CDL learners permit test because I failed my first two times. After studying the practice tests on driving-test.org over and over I was able to pass my CDL General Knowledge Test, Air-Brake Test and Combination Vehicle Test. Most if not all the questions on each test were the exact same questions that were on most of the driving-test.org practice tests which was so great. It made passing the tests so quick and easy!
D
Great investment.
This system was really worth the investment. I took 4 CDL tests in one sitting and passed them all with absolutely no problem. Had total confidence going in as the practice tests were really comprehensive and provided great explanations for the correct answers. And I didn't simply pass the tests - I really learned a lot of new things that are valuable no matter what type of vehicle you drive.
MM
I needed Hazmat and Tanker.
Best decision i made was to choose Driving-tests.org! It's very user friendly and always explains in detail, the correct answer. Several topics are not in the CDL handbook. So knowing more than what will be on the, DMV test was a welcomed surprise. Employers would appreciate knowing that too. If you get stuck the AI teacher can give you hints. So it gives a feeling of not being alone in the process. It cheers you on as well and gives boats of confidence along the way, regardless if you fail a test. The 192 question final exam, was a breeze after all!
ECJ
A great platform.
A great platform that I would recommend to anyone trying to get a Class A with endorsements. It was absolutely supplementary to the cdl manual in my studies. I was able to pass my permit test on the first try after only 1 week of study while barely skimming the manual. Thank you driving-tests.org for providing this intuitive service that maximizes efficiency by applying various teaching styles.
A

About the South Dakota CDL

“Officer Frank,” our automated assistant, will be present during your training sessions. This AI coach can provide insights and detailed explanations. Stuck on a difficult question? “Officer Frank” will nudge you in the right direction by supplying hints. (When you receive personalized help, it is easier to study and understand such a complex subject.) The questions you get wrong will be automatically added to your personal Challenge Bank™. We recommend visiting this section between your practice sessions to reinforce your knowledge and learn from your mistakes. Questions in your Challenge Bank will remain there until you answer them correctly.

For your convenience, we have omitted any timer from this practice test. Study without the pressure of a countdown and finish each training session at your own pace. Read every question twice and only select an answer when you’re confident of your choice. Please pay attention to the detailed explanation provided for each question and note it in a notebook or notebook app for future reference.

Becoming a successful commercial driver takes time and effort. Perseverance and consistency are essential throughout your learning phase, where you build the foundation for your dream career. Our South Dakota CDL Class B Practice Test can help you ace your theory exams on your first attempt, but you must stay consistent and practice daily.

We know what it takes to pass. And we’ve got the proof.

Driver’s Ed is - nobody wants to set foot inside the DMV. That’s why millions of learners trust us for simple, visual, effective prep.

An official & trusted partner in driver education

We are an officially recognized FMCSA Entry-Level Driver Training provider and a proud partner to over 2,500 libraries. We work with safety organizations like GHSA and the National Safety Council to help create safer roads for everyone.

A smarter way to study

Challenge Bank™

Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.

AI-powered feedback

Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.

Interactive handbook

Go beyond the boring black-and-white manual. Our interactive handbook lets you read, listen with an MP3 audio version, or even chat with it to find the information you need, faster.