Free 2027 SD DMV Practice Tests

Based on the official South Dakota Driver's Handbook. Get ready for your SD DPS written exam with our comprehensive practice tests.

SD CDL General Knowledge

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Questions 30
Mistakes 6 Max
Passing 80%

SD CDL Air Brakes

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Questions 25
Mistakes 5 Max
Passing 80%

SD CDL Combination Vehicles

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Questions 20
Mistakes 4 Max
Passing 80%

SD CDL Hazmat (H)

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Questions 30
Mistakes 6 Max
Passing 80%

SD CDL Tanker (N)

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Questions 20
Mistakes 4 Max
Passing 80%

SD CDL Doubles & Triples (T)

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Questions 20
Mistakes 4 Max
Passing 80%

SD CDL Passenger (P)

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Questions 20
Mistakes 4 Max
Passing 80%

SD CDL School Bus (S)

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Questions 20
Mistakes 4 Max
Passing 80%
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Practice by Topic

Commercial Driver's License (CDL)

Class A Prep Class B Prep Class C Prep Air Brakes Endorsement

South Dakota DMV Test FAQ

How many questions are on the South Dakota CDL permit test?

The SD DPS CDL knowledge test has 25 multiple-choice questions.

What is the passing score?

You must answer at least 20 questions correctly (80%) to pass.

Can I retake the test if I fail?

Yes. Retake policies vary by state; SD DPS typically lets you re-attempt the knowledge test after a short waiting period.