All your missed questions are saved
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It's a practice test that's automatically made up of all your missed questions. Once you finish this test, you’ll be able to revisit your Challenge Bank™ to practice and sharpen your skills.
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| 60-69 | => | 20% |
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Passing the CDL Combination Vehicles Knowledge Test is essential to earning your Class A Commercial Driver’s License (CDL) and legally operating combination vehicles (tractor-trailers) in the Palmetto State. You must also complete Entry-Level Driver Training (ELDT) through an FMCSA-registered provider and pass a South Carolina Division of Motor Vehicles (DMV) skills test in a combination vehicle.
The South Carolina Combination Vehicles Knowledge Test consists of 20 multiple-choice questions, and you must answer at least 16 correctly (80%) to pass. If you fail, you will face a minimum one-business-day waiting period before retaking the test. According to the South Carolina CDL Manual, your original application fee allows up to three attempts. After that, you’ll also be required to pay a new test fee for additional attempts.
Our Free South Carolina CDL Combination Practice Tests are designed to help you pass on your first attempt and avoid unnecessary fees and waiting periods. By offering expertly designed questions that mirror the official test and real-time feedback, hints, and AI learning tools, our practice tests increase retention and speed the overall process.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
The practice test follows the latest South Carolina CDL Manual and covers essential topics such as safe driving procedures for combination vehicles, air brake systems, coupling and uncoupling techniques, trip inspections, and trailer skids and jackknives.
With major trucking corridors like I-26, I-20, I-85, and I-95 running through South Carolina, connecting Charleston, Columbia, Greenville, and major hubs upstate, earning your Class A CDL dramatically increases driving opportunities. Industries like agriculture, port logistics, retail distribution, and manufacturing, including employers like Southeastern Freight Lines, FedEx Freight, Walmart Distribution, and Old Dominion, frequently seek drivers with Class A CDLs.
To further increase your professional competitiveness, consider adding endorsements for Tanker (N) (hauling bulk liquids and gases), Hazardous Materials (H), Doubles/Triples (T) (pulling multiple trailers), and Passenger (P) (including public transit and even school buses). Our suite of practice tests can help you prepare for those as well!
Additionally, most combination vehicles rely on air brake systems, so you’ll need to pass the Air Brakes Knowledge Test to remove the air brake restriction and operate these vehicles legally. We can help you with that, too!
Be sure to explore our full suite of South Carolina-specific practice tests to prepare for your official exam, restriction removals, and additional endorsements. With our help, you’ll pass on your first attempt!
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.
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.
Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.
Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.
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.
We build our practice questions from the current 2025 SC Driver Handbook and refine them using patterns recent test‑takers report.
Driver handbook • Knowledge‑test/permit overview • Fees & ID requirements • Office/appointment info
We mirror recurring themes (e.g., right‑of‑way traps, sign look‑alikes) and use similar distractors and wording styles.
We don’t collect or publish actual test items and we’re not affiliated with DMV.
