South Carolina SCDMV Motorcycle Practice Test 21
- Questions30
- Correct to pass24
- Passing score80%
- Minimum age15 years
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1. Some drivers believe they can multitask while driving. What does research show?
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Answer C: The brain switches rapidly between tasks and driving performance suffers
The brain does not truly do two attention-demanding tasks at once; it alternates between them, and the driving task gets less attention each time.
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2. What is a driver being warned about here?
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Answer B: The pavement ahead carries vehicles traveling in the opposite direction
Beyond this point vehicles come the other way on the same pavement, which commonly happens where a one-way section or a separated stretch comes to an end.
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3. A clutch cable adjusted with no free play at all causes what problem?
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Answer B: The clutch may slip and never fully engage
Without a small amount of slack the release mechanism keeps a light load on the plates, so they slip instead of transmitting full power.
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4. The overhead signal above your lane changes to a steady yellow X. What should you do?
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Answer B: Prepare to move out of that lane
A steady yellow X warns that the lane is about to close, so drivers should get ready to vacate it in favor of an open lane.
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5. You are already inside a roundabout when an emergency vehicle approaches with lights and siren. What should you do?
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Answer B: Continue to your exit, leave the roundabout, then pull over and stop
Stopping inside a roundabout blocks the circulating roadway, so you should exit first and then pull over clear of the intersection.
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6. How should cargo be carried on a motorcycle?
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Answer D: Kept low, in saddlebags or at about seat level
Keeping the load low preserves the center of gravity and the normal handling of the motorcycle, while a high load makes it top heavy and unstable.
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7. Your vehicle has broken down at night on a rural road and your phone has no signal. What is the safest thing to do?
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Answer C: Stay with the vehicle, keep the hazard lights on and wait for help
A lit vehicle is far easier to find than a person walking in the dark, and running the engine while you sleep risks carbon monoxide.
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8. How can the vehicle ahead of you help you read the road at night?
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Answer A: Its headlights light the road further ahead than yours can reach
The lights of the vehicle ahead reach beyond your own beam, so its brake lights and the way it moves warn you about holes, turns and hazards you cannot yet see.
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9. A center lane is marked with a broken yellow line on each side and is controlled by overhead lane signals. How is that lane used?
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Answer A: It carries traffic one way or the other according to the signals
A reversible lane is marked with broken yellow lines on both sides and its direction of travel is set by the lane control signals above it.
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10. What should be done with a group that has grown too large to manage?
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Answer D: Split it into smaller groups, each with its own leader and sweep rider
Smaller sub groups stay together more easily and are easier for other drivers to pass, and each one needs its own leader and sweep rider.
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11. What is wrong with slowing to a crawl at a stop sign and then rolling on through?
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Answer C: It is not a stop, and you may miss a pedestrian or cross traffic
A rolling stop is a violation and it also cuts short the moment you need in order to look carefully in each direction before entering.
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12. The low sun is directly ahead and glare makes it hard to see. What should you do?
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Answer C: Slow down, use the sun visor or sunglasses, and increase following distance
Sun glare can hide pedestrians, brake lights and signals. Reducing speed and adding space gives you time to react to what you cannot yet see.
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13. What must a motorcycle be equipped with before it can safely carry a passenger?
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Answer B: A seat large enough for two people and a set of passenger footrests
A passenger needs a seat with room for both people without crowding and firm footrests to brace against.
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14. Why is a wet road at night harder to read than the same road in daylight?
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Answer A: The wet surface reflects light away and swallows the lane markings
A film of water sends your headlight beam onward instead of back to you, so lines, edges and people in dark clothing almost disappear.
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15. Under South Carolina law, may a driver use a hand-held phone to report a crash they just witnessed?
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Answer B: Yes, reporting an accident, emergency, or safety hazard to a public safety official is exempted
Section 56-5-3890(C)(3) exempts reporting an accident, emergency, or safety hazard to a public safety official.
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16. A bus stopped at the corner hides the crosswalk you are about to turn across. What should you do?
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Answer C: Turn slowly, ready to stop for anyone stepping out in front of it
People often step into the road from in front of a stopped bus, so approach the hidden crosswalk slowly and be ready to stop.
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17. What does the thick foam liner inside a certified helmet actually do in a crash?
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Answer C: It crushes so the head slows down over a longer time and distance
The crushable liner is the part that absorbs energy, letting the head decelerate gradually instead of stopping instantly against a hard surface.
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18. How does higher speed affect the outcome of a crash?
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Answer A: It leaves less time to react and greatly increases the force of impact
Speed shortens the time available to avoid a hazard and raises the energy released in an impact, so both the likelihood and the severity of a crash increase.
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19. A sign warns that your exit leaves from the left side of the freeway. What should you do?
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Answer D: Move into the left lane in good time before you reach the exit
Left-hand exits are unusual, which is exactly why they are signed well in advance and why the lane changes should be finished early.
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20. How does driving on overinflated tires affect the vehicle?
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Answer D: It gives a harsher ride and a smaller contact patch
An overinflated tire bulges in the middle, so less rubber touches the road, grip suffers and the ride becomes hard. The center of the tread wears first.
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21. You are riding along a street lined with parked cars. What is the safest approach?
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Answer D: Move away from the parked cars, slow down, and watch for doors and people
Doors open, drivers pull out and pedestrians step between vehicles, so extra space and a lower speed give the rider time to see and react.
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22. What do the grooves in a tire tread do on a flooded road surface?
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Answer B: They give the water a way to escape so the tread can touch the road
Tread grooves pump water out from under the tire so rubber can meet pavement. A worn tread moves less water, so hydroplaning starts sooner.
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23. How should a group merge onto a busy highway from an entrance ramp?
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Answer D: One rider at a time into gaps in traffic, re-forming once all are on
Each rider needs a gap and enough speed of their own, so the group merges individually and only takes up the staggered formation again afterward.
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24. How long must the ignition interlock device stay installed to end a second-offense DUI suspension in South Carolina?
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Answer B: Two years
Section 56-5-2990(A)(3) requires two years of interlock use to end a second-offense suspension.
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25. What does this sign tell a driver about the road ahead?
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Answer A: The roadway changes direction ahead, so speed should be reduced before reaching it
It gives advance notice of a change in alignment so the driver can slow down before entering, since braking inside a bend uses up grip that is needed for steering.
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26. Federal law lets a state open its high-occupancy vehicle lanes to certain vehicles carrying only one person. Which of these is covered by that allowance?
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Answer B: Motorcycles
Federal law lets states allow motorcycles into high-occupancy vehicle lanes regardless of the number of occupants, because keeping riders in the flow is safer than the alternative.
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27. You turn left onto a road that has a center two-way left-turn lane. In which lane should you be traveling once the turn is finished?
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Answer D: The first through lane to the right of the center turn lane
The shared center lane is only for turning movements, so even where a state lets you pause in it to merge you must end up in the first ordinary travel lane beside it.
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28. At an intersection where turning right on red is permitted and no sign prohibits it, what must you do before turning?
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Answer A: Come to a complete stop and yield to pedestrians and cross traffic
A right turn on red is allowed only after a full stop, and the turning driver must yield to pedestrians in the crosswalk and to traffic already using the intersection.
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29. Your motorcycle has a grab rail behind the passenger seat. What should the passenger know about using it?
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Answer C: It is fine to hold, but they must still brace against acceleration
A rail behind the passenger gives a secure grip but does nothing to stop them sliding backward, so they still need to expect the machine to pull away.
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30. 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.