South Dakota DPS permit warm-up test
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age14 years
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1. A sign on a freeway restricts trucks to the two right-hand lanes. What should a car driver expect in those lanes?
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Answer A: More heavy vehicles and slower changes of speed
A truck lane restriction concentrates heavy vehicles on the right, and those vehicles accelerate, brake and change lanes far more slowly than cars.
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2. Which practice matches current child passenger safety guidance?
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Answer D: Keep a child rear facing until the top height or weight limit of the seat is reached
A rear facing seat spreads crash forces across the child's whole back, so it should be used as long as the seat allows, and never in front of an active passenger air bag.
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3. A driver who is passing you cannot complete the pass because a vehicle is coming. What should you do?
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Answer C: Ease off the accelerator and make room for them to drop back in
The only place for the passing vehicle to go is the gap behind you, and easing off opens that gap immediately.
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4. You have stopped on an uphill grade close behind a large truck at a traffic signal. What is the risk?
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Answer B: The truck may roll back into you when it starts to move
Heavy vehicles can roll backward a short distance when the driver moves from the brake to the accelerator on a hill. Leave extra room when stopped behind a truck on a grade.
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5. The vehicle in front of you has stopped and is waiting to turn left, and there is a paved shoulder to the right. May you use it to get by?
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Answer D: No, in most states a pass may not be made by leaving the paved travel lanes
Passing on the right is normally lawful only inside the marked travel lanes, and most states prohibit driving onto the shoulder to get around a turning vehicle; the few states that allow it attach strict conditions.
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6. Two left-turn lanes are marked at the intersection and you are in the left one. What must you do?
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Answer A: Stay in your own lane all the way around the turn
With dual turn lanes each driver must hold a lane through the whole turn and come out in the matching lane of the new street.
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7. What does electronic stability control do that ordinary brakes cannot?
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Answer C: It brakes single wheels to bring the vehicle back on your intended path
The system compares where you have steered with where the vehicle is actually going, then brakes individual wheels to pull it back into line.
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8. Why is a sign reading BRIDGE ICES BEFORE ROAD worth heeding even when the road itself is merely wet?
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Answer C: Cold air passes under a bridge as well as over it
A bridge deck loses heat from below as well as above, so it can be frozen while the road on either side of it is only wet.
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9. Someone stops drinking heavily at two in the morning and drives to work at eight. What is true?
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Answer A: They may still be impaired and over the limit
The body removes alcohol at a slow, fixed rate, so a heavy night can leave a driver impaired well into the next morning no matter how they feel.
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10. The electric windows will not work as your vehicle sinks in water. What is the best option?
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Answer C: Break a side window with a hard, pointed object and climb out through it
Side windows are tempered glass and can be broken, while the laminated windshield cannot, and water pressure holds the doors shut.