South Dakota General Knowledge Test
You'll face real questions from the same pool used at the Rapid City DMV – we built this test around them.
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About the South Dakota General Knowledge Test
If you drive a truck on South Dakota's interstates, you need a CDL. Our practice test covers exactly what the South Dakota DMV asks. You'll find questions on air brakes, cargo handling, and safe driving – all from the official handbook.
South Dakota's weather throws you curveballs. Blizzards on I-90 near Wall and high winds east of the Missouri River demand careful driving. Your test will cover winter driving, tire chains, and brake adjustments for slippery roads.
The state's agriculture and mining industries mean you'll haul heavy loads. Grain trucks, livestock trailers, and gravel rigs are common. We include load securement and weight limit questions specific to South Dakota's roads, including the I-29 grain route.
Don't study alone. Take this practice test first, then review the areas you miss. Most South Dakota drivers pass after three attempts. Start now and save yourself a trip to Pierre.
What This Test Covers
- Air brakes – critical for SD long hauls on I-90 where steep grades and cold weather test your brake system.
- Vehicle inspection – the pre-trip inspection you'll perform at the Rapid City DMV includes points specific to SD's winter conditions.
- Cargo securement – grain and livestock loads must meet South Dakota's tie-down rules for agricultural trucks.
- Safe driving techniques – handling crosswinds on the open prairie and black ice on rural highways.
- Road signs and signals – you'll see construction zone signs common on I-29 near Sioux Falls.
- Alcohol and drug regulations – South Dakota enforces strict CDL disqualification laws for DUI.
Study Tips
Read the official South Dakota CDL handbook at least once. The DMV pulls questions directly from it. Then take our practice test – it mimics the real 50-question format. Focus on the sections you miss.
Set aside two hours. The test takes up to 60 minutes, and you need 80% to pass. Don't rush. Many SD drivers fail because they guess too fast. Review the answer explanations after each question.
Call your local DMV office before you go. The Rapid City office requires appointments for knowledge tests. In Sioux Falls you might walk in, but it's better to schedule. Bring your proof of residency and Social Security card.
South Dakota DMV Information
South Dakota's CDL knowledge test costs $20. You can take it at DMV offices in Pierre, Sioux Falls, Rapid City, Aberdeen, and more. Appointments are recommended – walk-ins wait longer. Check the DPS website for hours.
You'll need two forms of ID, your Social Security card, and proof of South Dakota residency. If you're under 21, bring a parent's signature form. The test is computer-based. You'll get your score immediately.
Fail? You can retake it the next business day. No limit on attempts, but you pay $20 each time. Don't waste money – study hard. Our practice test covers the same material.
Frequently Asked Questions
Related Resources
Other South Dakota CDL Practice Tests
Test Details
- State: South Dakota
- Test: General Knowledge Test
- Questions: 140
- Passing Score: 80%
- Time Limit: 60 minutes
- Cost: Free
Need ELDT Training?
If you're getting your first CDL, you need ELDT theory training before your skills test.
Start Free ELDT TrainingQuick Topics
- Air brakes & pre-trip
- Cargo securement for ag loads
- SD weather driving rules