South Dakota DPS Permit Practice Test 27
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age14 years
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1. At roughly what speed can hydroplaning begin when a lot of water is lying on the road?
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Answer C: At speeds as low as about 35 mph
With enough water and less than perfect tread, a tire can start to ride on the water at around 35 mph, well below normal highway speeds.
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2. You are following another vehicle down a long, steep grade. What should you do about the gap?
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Answer D: Make it longer, because both of you need more room to stop
Everything takes longer to stop on a downgrade, including the vehicle ahead, so the gap that works on the flat is no longer enough.
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3. What counts as a complete stop at a stop sign?
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Answer C: The wheels stop turning before the stop line
A legal stop means the vehicle is no longer moving, made at the stop line or before entering the crosswalk or intersection.
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4. Someone appears seriously injured after a crash. What should you generally do?
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Answer C: Call for emergency help and avoid moving the person unless there is an immediate danger such as fire
Moving an injured person can worsen spinal or internal injuries, so summon trained help and leave the person in place unless staying there is more dangerous than moving.
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5. Some crosswalks are marked with two transverse lines and others with a row of wide bars laid along the direction of travel. Why is the second pattern used?
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Answer B: It is far easier for an approaching driver to see
Longitudinal bar patterns are used where extra visibility is wanted, such as an uncontrolled crossing or one near a school, because they show up much better from a car.
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6. You must slow suddenly on a highway and a vehicle is following close behind you. What helps prevent a rear-end collision?
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Answer D: Tapping the brake pedal early so your brake lights flash a warning
Early brake light flashes give the driver behind more time to react, and slowing gradually instead of suddenly reduces the chance of being struck.
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7. Which surfaces usually offer less grip than the pavement around them when wet?
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Answer B: Painted markings, metal plates and bridge decks
Paint, steel and bridge decks all shed grip when wet or cold, so brake before you reach them rather than on top of them.
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8. Why is backing up on a freeway or on its shoulder prohibited?
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Answer A: Traffic arrives far too fast to expect a vehicle moving the wrong way
Freeway traffic closes on a stopped or reversing vehicle at highway speed and has almost no time to react to something moving against the flow.
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9. Your parking brake no longer holds the car on a slope. What should you do?
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Answer D: Have it repaired, and until then park only on level ground
A parking brake that will not hold is a defect to be fixed; avoiding grades in the meantime keeps the vehicle from rolling away.
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10. The queue for an exit ramp has backed up into the right lane of the highway. What should you do if you want that exit?
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Answer B: Join the back of the queue in the lane instead of cutting in later
Passing a queue and forcing in at the front stops the whole line, and using the shoulder puts you where broken-down vehicles are expected to be.
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11. You have parked a manual transmission car facing downhill. Which gear should you leave it in?
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Answer D: Reverse, along with the parking brake set firmly
Facing downhill the car would roll forward, so reverse gear opposes that movement while the parking brake and turned wheels back it up.
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12. What is the safest way to deal with a vehicle sitting in your blind spot?
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Answer A: Slow a little or move ahead so that it is no longer beside you
You cannot control the other driver, but you can change your own speed so that the vehicle is no longer hidden beside you.
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13. How many points does a South Dakota driving while intoxicated conviction add to a driving record?
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Answer D: 10 points
A DWI conviction carries 10 points, the highest value on the South Dakota schedule, and it also triggers a mandatory license revocation.
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14. You are about to pass a long tractor-trailer on a two-lane road. What should you expect?
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Answer B: You will need more clear road, since the vehicle is much longer
A tractor-trailer can be 70 feet long, so passing it takes more distance and more time than passing a car at the same speed difference.
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15. A yellow diamond in which one line joins another at an angle warns that
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Answer B: traffic from another roadway will merge into the driver's lane ahead
The merge sign warns that another traffic stream will join the same lane ahead, so drivers on both roadways must adjust speed and spacing.
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16. After a crash your door will not open and you need to get out of the car. What should you try?
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Answer B: Try another door of the vehicle, or a window that will still open properly
A jammed door is common after an impact, and the simplest escape is a different door or a window rather than forcing the damaged one.
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17. Which of these is part of preparing a vehicle for winter driving?
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Answer A: Fitting good tires and using washer fluid that will not freeze
Winter readiness means tread, battery, wipers, antifreeze and washer fluid rated for the cold, plus a reasonable amount of fuel in the tank.
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18. A sign reads END SCHOOL ZONE. What does it tell a driver?
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Answer A: The regular limit for that road applies again
An end of restriction sign marks the downstream limit of a special zone, after which the ordinary speed limit for that road governs again.
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19. How can you check that you are keeping a safe following distance?
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Answer A: Count at least three seconds between the vehicle ahead passing a fixed object and your reaching it
Pick a fixed roadside object, start counting when the vehicle ahead passes it and make sure at least three seconds elapse before you reach it, adding more time in poor conditions.
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20. What is the sensible way to handle a meal on a long drive?
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Answer D: Eat before you leave or stop to eat
Eating takes hands, eyes and attention, and the only version with no cost to your driving is the one that happens while the car is parked.
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21. You are in the open lane where another lane is merging into yours. What is your part in the merge?
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Answer A: Keep a steady speed and leave a gap for one vehicle to come in
A merge works when each driver in the through lane lets one vehicle in, which keeps both lines moving instead of stopping them both.
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22. Why does a dirty windshield matter much more at night than during the day?
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Answer C: Dust and streaks scatter oncoming light and increase glare
Film and streaks on the glass spread every oncoming headlight into a star of glare, so clean the inside as well as the outside before a night trip.
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23. A child has outgrown the rear-facing seat. What comes next?
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Answer D: A forward-facing seat with a harness, used up to its own stated limits
The stages run rear facing, then forward facing with a harness, then a booster, then the adult belt alone.
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24. You are about to pull out of a driveway when someone on the sidewalk is walking toward it. What should you do?
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Answer D: Wait, because traffic on the sidewalk has the right-of-way
A vehicle entering the roadway from a driveway yields to people on the sidewalk as well as to traffic on the street.
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25. A school bus ahead of you has its red lights flashing and its stop arm extended. What are you required to do?
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Answer A: Stop and stay stopped until the lights stop flashing and the bus starts moving
Flashing red lights and an extended stop arm mean children are getting on or off, so traffic must stop and wait until the bus withdraws the signals and moves again.