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SD CDL Double/Triple Trailers Practice Test 3 2025

5 min
Score distribution:
90-100=>0%
80-89=>100%
70-79=>0%
60-69=>0%
<60%=>0%
Avg. first-try score: 80%

Your appetite for chislic may only be rivaled by the professional driving skills you crave. Using our practice test series, you can fully understand the rules and regulations for pulling multiple trailers. Adding a “T” endorsement to your South Dakota commercial driver’s license (CDL) can open up your career opportunities and increase your earnings. However, you need to be trained by a credible source. With our third free South Dakota DMV CDL Double/Triple Trailer endorsement practice test, you’ll gain access to an effective study method designed to meet your personal learning objectives. The practice test gives you the advantage of learning essential information from an authoritative source. It’s the fastest way of acquiring the essential skills for your success.

Capturing your specific learning obstacles, our South Dakota DMV CDL Double/Triple Trailer endorsement practice test helps you develop a plan to overcome them. It is important that you address your misunderstandings to pass the official knowledge test required to receive your endorsement. The practice test contains 20 questions, like the ones on the official knowledge test, to identify the information you should study more. This approach allows you to make an effective and time-efficient study plan for correctly answering at least 80% of the 20 questions on the official knowledge test required to earn a passing score.

SD CDL Double/Triple Trailers Practice Test 3 2025
Commercial Driver's License
Based on the official SD CDL HandbookHandbook‑based (2025) + exam‑taker feedback
2 SD students practicing now
160completed today

Accuracy & authorship

Steven Litvintchouk, M.S., Chief Educational Researcher at Driving-Tests.org

Reviewed for legal and handbook accuracy:

Steven Litvintchouk

M.S., Chief Educational Researcher (ACES member)

Last verified for accuracy on

Andrei Zakhareuski, Co-founder & CEO at Driving-Tests.org

Test design and learning experience oversight:

Andrei Zakhareuski

Co-founder & CEO, Driving-Tests.org

How to use this practice test

  1. Start here. One of 4 free South Dakota tests. ~5 min. Read explanations as you go.
  2. Cover more ground. All tests have different questions - no repeats.
  3. Finish strong. Try the Exam Simulator for a full-length run.

Why this works

  • Exam-like questions from the current handbook + real test-taker patterns. Explanations cite the manual.
  • AI Assistant explains tricky items in plain language.
  • Performance Insights show your weak topics and what to study next.
  • Challenge Bank™ saves your mistakes for targeted practice.

Actual DMV permit test: What to expect?

The South Dakota permit test has 20 questions. You must get 16 correct (80%) to pass.
  • Where: Any South Dakota DMV office (find locations)
  • Bring: ID + SSN + residency proof + permit/license fee (see checklist)
  • If you fail: Retake the next day.
  • Commonly missed: headlight usage and when to turn them on, roundabouts and lane usage.
  • Ready to schedule? Book your SD DMV appointment

About the South Dakota CDL

This South Dakota DMV CDL Double/Triple Trailer endorsement practice test uses an interactive teaching method to help you absorb critical information. If you get a question wrong, the practice test responds with a thorough explanation of the information you must know. You are provided immediate access to this information and won’t waste valuable study time consulting additional resources. The practice test is based on the most recent South Dakota DMV CDL manual (South Dakota CDL Handbook 2025) and is up to date as of December 2025. By referencing the CDL manual, the practice test guarantees the information provided is accurate and applicable to various driving scenarios on the official knowledge test. The practice test will equip you with superior driving skills, making it possible to pass the official knowledge test on your first try.

Belle Fourche is near the “Center of the Nation,” and you can develop core professional driving skills using the practice tests at https://driving-tests.org/south-dakota/sd-cdl-practice-test/.

More SD CDL test resources Doubles/Triples practice test hub

  1. Double/Triple Trailers Test 1
  2. Double/Triple Trailers Test 2
  3. Double/Triple Trailers Test 3 (you are here)

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.