Vehicle maintenance — South Dakota Permit Test
Vehicle maintenance on the South Dakota permit test — 8 rules, each with the reason behind it and a question on it while it is fresh.
The rules
It is the duty of drivers to make certain that the vehicles they drive are safe to operate.
A car with bad brakes or bald tires can turn an easy stop into a crash.
It is the duty of drivers to make certain that the vehicles they drive are safe to operate.
If the brakes do not seem to work properly, make a lot of noise, smell funny, or the brake pedal goes to the floor, have a mechanic check them.
Only your brakes can stop the car, and a pedal that sinks to the floor means they may soon fail.
If they do not seem to be working properly, are making a lot of noise, smell funny, or the brake pedal goes to the floor, have a mechanic check them out.
Make sure turn signals, brake lights, taillights and headlights work, checking them from the outside of the vehicle.
A dead brake light gives the driver behind no warning, and they hit you when you stop.
These should be checked from the outside of the vehicle.
If you have trouble seeing at night or other drivers keep flashing their headlights at you, have a mechanic check the headlights, since an out-of-line headlight can blind other drivers.
A headlight aimed wrong lights the trees instead of the road and dazzles drivers coming at you.
If you are having trouble seeing at night or if other drivers are constantly flashing their headlights at you, have a mechanic check out the headlights.
Damaged windshield glass can break more easily in a minor collision, so have a damaged windshield replaced; replace wiper blades that are not clearing water well.
A cracked windshield can shatter in a small bump, and smeared wipers hide the road in rain.
Damaged glass can break more easily in a minor collision or when something hits the windshield.
Worn or bald tires can increase the stopping distance, make turning harder on wet roads, and cause hydroplaning.
Bald tires ride up on a film of water and the car will not steer or stop.
Worn or bald tires can increase the stopping distance and make turning more difficult when the road is wet.
If the vehicle bounces, the steering wheel shakes, or the vehicle pulls to one side, have a mechanic check it.
A car that pulls or shakes can jerk out of your lane when you brake hard.
If the vehicle bounces, the steering wheel shakes, or the vehicle pulls to one side, have a mechanic check it out.
If the vehicle bounces a lot after a bump or a stop, or is hard to control, you may need new shocks or other suspension parts.
Worn shocks let the car bounce and lose grip just when you need to swerve.
If the vehicle bounces a lot after a bump or a stop, or is hard to control, you may need new shocks or other suspension parts.
On the test
Whose duty is it to make sure a vehicle is safe to operate?
The driver of the vehicle. A car with bad brakes or bald tires can turn an easy stop into a crash. South Dakota Driver License Manual, p.23: “It is the duty of drivers to make certain that the vehicles they drive are safe to operate.”
How this works
Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.
You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.
Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.
What it costs
- One payment, once — not a subscription. Nothing renews and there is nothing to cancel, for an exam you sit one time.
- Free to start: a 10-question test and the first section of cards. No sign-up and no account.
- Paying opens the rest of the cards, unlimited full-length practice tests, and retests built from exactly the questions you got wrong.
- Every level up to Prepared — 3 tests passed in a row.
- Do the work, fail the real exam, and we refund you.
All South Dakota permit topics
Where these come from
Every rule here is checked against South Dakota Driver License Manual, published by the South Dakota Department of Public Safety, and against the state code itself. Last checked 2026-10-04.
- src/assets/drivers-manuals/SD.pdf (South Dakota Driver License Manual, Revised 11/2024, South Dakota Department of Public Safety, retrieved 2026-09-14 and re-checked 2026-10-04; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SD.pages.txt (pdftotext -layout, the fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SD-exam.html (South Dakota Department of Public Safety, South Dakota Driver License Testing Information, KB0043731, read 2026-10-04; states the 80% rate; sha256 pinned under examSource)
- https://www.sd.gov/dps?id=cs_kb_article_view&sysparm_article=KB0043733 (read 2026-10-04; links the manual)