South Dakota DPS Permit Practice Test 42
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age14 years
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1. A driver moves into the space you were keeping ahead of you. What should you do?
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Answer D: Ease off and rebuild the gap in front of you
Losing a following gap is common in traffic; the answer is simply to drop back and recreate it rather than drive too close.
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2. Why is the road often most slippery during the first few minutes of rain after a long dry spell?
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Answer C: Oil and dust on the surface mix with the water into a slick film
Oil drippings and road dust build up on dry pavement, and the first light rain lifts them into a slippery film before heavier rain washes it away.
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3. You stop behind another vehicle at a traffic light. How much space should you leave?
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Answer D: Enough to see where its rear tires touch the pavement
Seeing the rear tires on the road leaves room to steer around the vehicle if it stalls, and gives a cushion if you are struck from behind.
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4. You are traveling in the same direction as a funeral procession and want to get ahead of it. What should you not do?
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Answer B: Driving in between the vehicles of the procession
Most states prohibit driving into or through a funeral procession, and cutting into the line leaves the drivers behind with no lead vehicle to follow, so go around only where passing is permitted.
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5. You are behind a slow vehicle on a two-lane road and a marked passing lane begins a mile ahead. What is the sensible choice?
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Answer D: Wait for the passing lane rather than using the opposing lane
A passing lane lets you overtake without ever entering the lane used by oncoming traffic, which is far safer than a pass a minute earlier.
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6. In a South Dakota urban district with no posted or zoned speed limit, what is the maximum lawful speed?
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Answer D: 25 miles per hour
Absent posting or zoning under the speed-zone statute, the default maximum in an urban district is 25 miles per hour.
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7. Your tires drop into deep slush that has built up between the travel lanes. What should you do?
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Answer B: Ease off the accelerator and grip the wheel, since slush tugs the vehicle
Slush grabs at the tires and can pull the vehicle sideways. Reduce power gently, hold the wheel firmly and avoid sudden steering or braking.
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8. Which color scheme is standard for the drums and barricades that channel traffic through a work zone?
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Answer C: Alternating orange and white retroreflective stripes
Drums and barricades carry alternating orange and white retroreflective stripes, and the traffic cones used in the same zones are predominantly orange.
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9. You want to pass on a two-lane road where several people are walking on the narrow shoulder ahead. What should you consider?
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Answer D: There is no escape room if the pass goes wrong, so wait for a better place
A pass depends on having somewhere to go if it goes wrong, and a shoulder occupied by pedestrians removes that option for both vehicles.
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10. How should a head restraint be adjusted?
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Answer D: So the top is at least as high as the back of your head and close behind it
A restraint set at head height and close behind limits how far the head snaps backward in a rear impact, which is what reduces neck injury.
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11. A single solid white line separates two lanes running in the same direction. What is it telling drivers?
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Answer A: Changing lanes there is discouraged
A solid white lane line discourages lane changing, typically where merging or weaving would create a hazard.
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12. You are turning left out of a driveway onto a busy two-way street. What must you do?
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Answer D: Wait for a gap in both directions before you start to move
The turn crosses one direction of traffic and joins the other, so you need a gap in both before leaving the driveway rather than stopping across a lane.
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13. You are towing a trailer and turning right at an intersection. What must you allow for?
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Answer D: The trailer cuts the corner, so swing wider than usual
A trailer follows a shorter path than the towing vehicle, so its wheels track inside your line and can mount the curb unless you take the turn wide.
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14. Some toll facilities use signs and markings with a purple background or a purple stripe. What do they identify?
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Answer D: Lanes reserved for vehicles with an electronic toll account
Purple is assigned to lanes and ramps restricted to vehicles with a registered electronic toll collection account, so drivers without one must stay out.
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15. How do extra passengers affect a driver, especially a new one?
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Answer A: They increase the chance of distraction and of crashes
Conversation, laughter and horseplay pull a driver's attention away from the road. Crash risk for young drivers rises with each additional passenger.
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16. A rectangular marker with alternating black and retroreflective yellow stripes set at a slant is used to
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Answer C: mark an obstruction, with the stripes sloping down toward the side on which traffic should pass
This striped panel is an object marker, and the direction in which the stripes slope shows the driver which side of the obstruction to pass on.
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17. A power line has fallen across your vehicle after a crash. What should you do?
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Answer C: Stay inside and wait for utility workers unless fire forces you out
The vehicle body may be energized, and touching it and the ground at the same time can be fatal. If you must leave because of fire, jump clear with both feet together and shuffle away.
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18. Is it acceptable to drive with your vehicle straddling the line between two lanes?
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Answer D: No, you must drive as nearly as practical entirely within a single lane
A vehicle astride the line takes up two lanes and leaves the drivers around it unable to predict where it will go.
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19. This sign leads to a crossing that has no gates and no flashing lights. What does that mean for the driver?
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Answer D: Nothing will warn of an approaching train, so the driver must check the tracks personally
At a passive crossing there is no active device to announce a train, so the whole judgment rests on the driver, who must approach slowly enough to stop after looking along the track.
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20. A white regulatory sign shows the silhouette of a truck inside a red circle with a diagonal slash. What does it mean?
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Answer A: Trucks are not allowed to use that road
The circle and slash over a symbol always means the movement or vehicle shown is prohibited, so trucks must keep off that roadway.
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21. Your vehicle leaves the road and enters deep water. What gives you the best chance of escape?
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Answer B: Release your seat belt and get out through a window as quickly as possible
Water pressure holds the doors shut, so a window is the reliable exit and the first seconds after entry are the best time to use it.
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22. A yellow sign ahead of an underpass reads LOW CLEARANCE 12 FT 6 IN. What does the figure tell you?
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Answer B: The greatest height that can pass beneath the structure
The figure is the actual clearance available, so a vehicle taller than that must leave the road and take a marked alternative route.
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23. A high truck ahead of you hides the traffic signal as you approach the intersection. What should you do?
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Answer A: Drop back so you can see the signal and the truck's brake lights
Extra following distance restores your view of the signal, so you are reacting to the light yourself rather than copying the truck driver.
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24. How does eating a large meal before drinking affect impairment?
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Answer D: It slows absorption but the alcohol still reaches the blood and impairs you
Food delays how quickly alcohol enters the bloodstream, which can make the peak arrive later, but all of the alcohol is eventually absorbed.
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25. On which approach is this sign normally installed?
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Answer C: On the road that ends, far enough ahead for the driver to slow down
The warning belongs on the approach that terminates, placed early enough that the driver can lose speed and choose a direction before reaching the junction.