South Dakota · CDL

South Dakota CDL Practice Test

The South Dakota CDL knowledge test is administered by South Dakota Department of Public Safety, Driver Licensing. This free practice test covers the 10 areas the South Dakota Commercial Driver License Manual teaches, from south dakota cdl classes permits testing and driver qualifications to hazardous materials and school bus safety, with 100 questions written for South Dakota and every answer explained. Pick 25, 50, or 100 questions and start; there is no sign-up.

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Take the South Dakota CDL practice test

The South Dakota bank holds 100 questions written for the South Dakota Commercial Driver License Manual, 1 of them illustrated with a sign, signal, marking, or road scene. Choose a Quick check of 25, a Practice run of 50, or the Full challenge of 100 on the next screen, then choose coaching mode, which explains every answer as you go, or exam mode, which holds the explanations until the end and still shows your running score. It is free, there is no sign-up, and a test in progress is saved on this device.

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Sample questions

Six questions from the South Dakota bank, with the rule behind each answer

Sample 1 · South Dakota Cdl Classes Permits Testing And Driver Qualifications

At a Pierre motor carrier's CDL planning conference, a trainee works through this independently worded scenario: A truck-trailer combination is rated at 28,900 pounds, with an 11,300-pound-GVWR trailer. Which CDL class covers it? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.

  1. The South Dakota route supervisor should record: class A because the combination reaches 26,001 pounds and the towed vehicle is above 10,000 poundsCorrect
  2. The South Dakota route supervisor should record: class B because a single trailer can never make a Class A combination
  3. The South Dakota route supervisor should record: class C because the trailer rating is below the combination rating
  4. The South Dakota route supervisor should record: no CDL because neither unit alone has a 26,001-pound rating

Why: Class A covers a combination rated at least 26,001 pounds when the towed vehicle or vehicles have a gross vehicle weight rating above 10,000 pounds. The South Dakota training case therefore supports "The South Dakota route supervisor should record: class A because the combination reaches 26,001 pounds and the towed vehicle is above 10,000 pounds".

Sample 2 · Speed Space Hazards Weather And Railroad Crossings

In a Rapid City fleet briefing for prairie-weather hazards, a trainee works through this independently worded scenario: A delivery truck's flat mirror leaves a blind strip beside the cargo body. How should the driver use the convex mirror fitted below it? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.

  1. The South Dakota route supervisor should record: use the convex view to monitor a wider area while remembering that vehicles appear smaller and farther awayCorrect
  2. The South Dakota route supervisor should record: judge exact following distance from the convex view because it shows true size
  3. The South Dakota route supervisor should record: aim the convex mirror only at the truck's own rear tire and ignore adjacent traffic
  4. The South Dakota route supervisor should record: replace all direct observation with the convex image during lane changes

Why: Mirror checks should be brief, and convex mirrors require judgment because they make objects appear smaller and farther away than they are. The South Dakota training case therefore supports "The South Dakota route supervisor should record: use the convex view to monitor a wider area while remembering that vehicles appear smaller and farther away".

Sample 3 · Cargo Inspection Weight Balance And Securement

During a Watertown cargo-securement workshop, a trainee works through this independently worded scenario: Warehouse employees load and tie down every pallet while the driver waits in the cab. Who remains accountable for safe cargo before departure? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.

  1. The South Dakota route supervisor should record: the driver, who must be satisfied that the load is properly distributed and securedCorrect
  2. The South Dakota route supervisor should record: only the forklift operator because that person touched the freight
  3. The South Dakota route supervisor should record: the consignee, but only after the truck arrives
  4. The South Dakota route supervisor should record: nobody aboard the vehicle when a sealed trailer is involved

Why: Even when another person loads the vehicle, the driver remains responsible for inspection, overload and balance recognition, securement, clear visibility, and access to emergency equipment. The South Dakota training case therefore supports "The South Dakota route supervisor should record: the driver, who must be satisfied that the load is properly distributed and secured".

Sample 4 · Passenger Vehicle Inspection Loading And Operation

At a Brookings passenger-service safety briefing, a trainee works through this independently worded scenario: The previous bus inspection report lists a broken seat frame. What must the next driver confirm before signing the report? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.

  1. The South Dakota route supervisor should record: the report is more than one day old and can therefore be ignored
  2. The South Dakota route supervisor should record: the bus completed one trip after the defect was found
  3. The South Dakota route supervisor should record: the defect was repaired, or the carrier certified that immediate repair was unnecessaryCorrect
  4. The South Dakota route supervisor should record: a passenger agreed not to sit in the damaged seat

Why: A bus driver signs the previous driver's inspection report only after listed defects have been certified as repaired or certified as not requiring repair. The South Dakota training case therefore supports "The South Dakota route supervisor should record: the defect was repaired, or the carrier certified that immediate repair was unnecessary".

Sample 5 · Combination Vehicle Control Coupling And Inspection

At a Yankton combination-vehicle planning meeting, a trainee works through this independently worded scenario: A trailer is loaded with heavy rolls stacked high along its left wall. Which correction most directly reduces rollover risk? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.

  1. The South Dakota route supervisor should record: leave the load in place and compensate by steering more sharply
  2. The South Dakota route supervisor should record: add more weight high on the right wall without lowering either side
  3. The South Dakota route supervisor should record: move the heavy cargo lower, nearer the center, and distribute its weight across the vehicleCorrect
  4. The South Dakota route supervisor should record: concentrate the entire load at the rear doors above the floor

Why: Combination cargo should be kept low, centered, and distributed because a high or side-biased center of gravity increases rollover risk. The South Dakota training case therefore supports "The South Dakota route supervisor should record: move the heavy cargo lower, nearer the center, and distribute its weight across the vehicle".

Sample 6 · Hazardous Materials And School Bus Safety

At a South Dakota school-transport and hazmat seminar, a trainee works through this independently worded scenario: A shipper offers a leaking hazardous-material package with incomplete preparation. What responsibility remains with the accepting driver? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.

  1. The South Dakota route supervisor should record: load it near the cab so the driver can ignore preparation defects
  2. The South Dakota route supervisor should record: accept it because all package responsibility ends with the shipper
  3. The South Dakota route supervisor should record: reject the package, then maintain proper papers and placards and transport only a compliant shipment safelyCorrect
  4. The South Dakota route supervisor should record: cover the leak with a placard and omit the shipping papers

Why: The hazardous-material driver rejects leaking or improperly prepared packages, maintains required placards and papers, and transports the shipment safely after shipper and carrier checks. The South Dakota training case therefore supports "The South Dakota route supervisor should record: reject the package, then maintain proper papers and placards and transport only a compliant shipment safely".

What is on the test

The 10 topics the South Dakota CDL practice test covers

These are South Dakota's own topic areas, from south dakota cdl classes permits testing and driver qualifications to hazardous materials and school bus safety, each with 10 questions. Under each one are two questions from the bank, shown without their answers; the practice test explains every one of them.

  1. South Dakota Cdl Classes Permits Testing And Driver Qualifications10 questions
    • At a Pierre motor carrier's CDL planning conference, a trainee works through this independently worded scenario: A 31,200-pound-GVWR straight truck tows a 6,400-pound trailer. What class describes the setup? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
    • At a Pierre motor carrier's CDL planning conference, a trainee works through this independently worded scenario: A light shuttle is designed for exactly 16 people counting the driver. It does not meet Class A or B weight definitions. What applies? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
  2. Vehicle Inspection Control Visibility And Communication10 questions
    • During a Sioux Falls terminal's inspection and control workshop, a trainee works through this independently worded scenario: Why can discovering a suspension defect before a trip be more important than meeting the delivery schedule? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
    • During a Sioux Falls terminal's inspection and control workshop, a trainee works through this independently worded scenario: During travel, the driver hears a new scraping sound and feels steering vibration while a gauge moves outside its normal range. What should follow? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
  3. Speed Space Hazards Weather And Railroad Crossings10 questions
    • In a Rapid City fleet briefing for prairie-weather hazards, a trainee works through this independently worded scenario: Traffic is close behind as a tractor approaches a left turn into a narrow terminal entrance. Which signal routine gives others the clearest warning? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
    • In a Rapid City fleet briefing for prairie-weather hazards, a trainee works through this independently worded scenario: Rain has just begun after a dry spell, and shallow water is collecting in the wheel tracks. What speed decision best addresses the loss of traction? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
  4. Emergencies Abs Skids Crashes Fires And Driver Fitness10 questions
    • At an Aberdeen carrier's emergency-readiness meeting, a trainee works through this independently worded scenario: A stalled car suddenly blocks the lane and the escape shoulder is open. How should a driver steer around it without creating a second loss of control? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
    • At an Aberdeen carrier's emergency-readiness meeting, a trainee works through this independently worded scenario: The road ahead closes unexpectedly, but the vehicle still has traction and room to stop straight. What does controlled braking call for? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
  5. Cargo Inspection Weight Balance And Securement10 questions
    • During a Watertown cargo-securement workshop, a trainee works through this independently worded scenario: A newly loaded truck leaves a Minneapolis terminal. When is the first en-route cargo securement inspection due? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
    • During a Watertown cargo-securement workshop, a trainee works through this independently worded scenario: After the initial cargo check, a driver continues without loading or route changes. Which interval governs later rechecks? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
  6. Passenger Vehicle Inspection Loading And Operation10 questions
    • At a Brookings passenger-service safety briefing, a trainee works through this independently worded scenario: A bus is ready to move, but a roof hatch is open for ventilation and a side access panel is unlatched. What should the driver do? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
    • At a Brookings passenger-service safety briefing, a trainee works through this independently worded scenario: Carry-on bags are stacked in the aisle between occupied seats and the rear exit. Why must they be moved? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
  7. Air Brake Components Inspection And Use10 questions
    • During a Mitchell air-brake systems clinic, a trainee works through this independently worded scenario: A mechanic distinguishes the three functions built into an air-braked vehicle. Which description matches them? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
    • During a Mitchell air-brake systems clinic, a trainee works through this independently worded scenario: System pressure reaches the governor's upper setting and the compressor stops pumping. When should pumping resume? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
  8. Combination Vehicle Control Coupling And Inspection10 questions
    • At a Yankton combination-vehicle planning meeting, a trainee works through this independently worded scenario: A sudden lane change is magnified as motion travels toward the rear of a multiple-unit combination. How should that affect steering? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
    • At a Yankton combination-vehicle planning meeting, a trainee works through this independently worded scenario: Why can a bobtail tractor be less forgiving under braking than the same tractor pulling a loaded trailer? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
  9. Doubles Triples And Tank Vehicle Operation10 questions
    • During a Spearfish tanker and multiple-trailer route review, a trainee works through this independently worded scenario: In a triple-trailer combination, which unit faces the greatest crack-the-whip rollover risk during an abrupt steering input? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
    • During a Spearfish tanker and multiple-trailer route review, a trainee works through this independently worded scenario: One semitrailer in a twin set is much heavier than the other. Which coupling order gives the better handling arrangement? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
  10. Hazardous Materials And School Bus Safety10 questions
    • At a South Dakota school-transport and hazmat seminar, a trainee works through this independently worded scenario: Where should hazardous-material shipping papers be kept while the driver is belted and the vehicle is moving? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
    • At a South Dakota school-transport and hazmat seminar, a trainee works through this independently worded scenario: Which sequence contains the basic hazardous-material description on a shipping paper? The conclusion will be added to the Mount Rushmore State fleet's prairie-route operations record.
How to prepare

A study plan for the South Dakota CDL knowledge test

1

Find out where you stand

Take a Quick check of 25 in coaching mode. Read each explanation, including the ones you got right; it tells you the rule South Dakota tests, not just the answer.

2

Study the topics you missed

Your account's Study tab ranks the 10 topics by your results. Read that chapter of the South Dakota Commercial Driver License Manual, then take another Quick check to confirm the gap has closed.

3

Rehearse the real thing

Take the Full challenge of 100 in exam mode. Aim for 80 percent or better twice in a row; at that point you are answering from the rules, not from memory of the questions.

Questions

South Dakota CDL practice test questions

Is this the official South Dakota CDL knowledge test?

No. DMV Exam Pass is an independent study service and is not affiliated with South Dakota Department of Public Safety, Driver Licensing. The questions are written in the style of the exam to prepare you for it; the official test is taken with the agency.

What does the South Dakota CDL practice test cover?

The 100 questions are spread evenly across 10 topics: South Dakota Cdl Classes Permits Testing And Driver Qualifications, Vehicle Inspection Control Visibility And Communication, Speed Space Hazards Weather And Railroad Crossings, Emergencies Abs Skids Crashes Fires And Driver Fitness, Cargo Inspection Weight Balance And Securement, Passenger Vehicle Inspection Loading And Operation, Air Brake Components Inspection And Use, Combination Vehicle Control Coupling And Inspection, Doubles Triples And Tank Vehicle Operation, and Hazardous Materials And School Bus Safety. Every test you take draws from all of them, so a weak area shows up quickly.

How many questions are in the practice test, and how long does it take?

The South Dakota bank holds 100 questions. A Quick check of 25 takes about ten minutes, a Practice run of 50 about twenty, and the Full challenge of 100 about forty. You can pause any time.

Are these the real questions from the South Dakota exam?

No. Nobody outside the agency has the real questions, and we do not use, claim, or advertise leaked or exact exam questions. These are independently written questions that test the same rules, so what you learn transfers to whatever the real test asks.

Which handbook should I study for the South Dakota CDL knowledge test?

The South Dakota Commercial Driver License Manual, published by South Dakota Department of Public Safety, Driver Licensing. Every question here is written for it, and each explanation names the rule, so when you miss a question you know which chapter to read.

What is the difference between coaching mode and exam mode?

Coaching mode shows whether each answer was right, and why, before you move on; it is for learning. Exam mode holds the explanations and the correct choices until the end and still shows your running score; it is for checking readiness. Both draw from the same bank, and scoring happens on our servers, so no answer key is loaded in your browser.

Does the practice test include road signs and pictures?

Yes. 1 of the 100 questions are illustrated with a sign, signal, marking, or road scene, the way the CDL knowledge test presents them.

Is the South Dakota practice test free, and do I need an account?

It is free, with no sign-up. An optional account saves your progress across devices and shows which topics need work.

Can I pause and come back later?

Yes. A test in progress is saved on this device and offered again when you return. With an account, it is saved to your account as well, so you can continue on another device.

What score should I aim for before test day?

Aim for 80 percent or better on a Full challenge in exam mode, more than once. The official passing score is set by the agency; scoring consistently above 80 here means you are answering from the rules rather than from luck.