Illinois SOS Permit Practice Test 15
- Questions35
- Correct to pass28
- Passing score80%
- Minimum age15 years
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1. 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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2. Your vehicle has a blind spot warning light in the door mirror. What should that mean for your habits?
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Answer B: You still check the blind spot yourself, because the system can miss a rider
Blind spot systems are an aid, not a substitute, and a motorcycle or a bicycle can be missed or arrive faster than the sensor expects.
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3. Small green signs with white numerals posted at regular intervals along a highway are used to
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Answer B: show distance along the route and give a reference point for reporting a location
Reference location signs, commonly called mileposts, carry white numerals on green and let a driver describe exactly where a breakdown or crash has occurred.
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4. A lane along the right edge is set off by a solid white line and marked with a bicycle symbol. How should a driver treat it?
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Answer B: Stay out of it except for the short distance needed to turn or cross where that is allowed
A marked bicycle lane is set aside for bicycle traffic, and motor vehicles may enter it only briefly where turning or crossing is permitted.
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5. A bicyclist in the bike lane ahead of you signals and starts to move left toward the turn lane. What should you do?
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Answer A: Slow down and let the rider move across
A bicyclist who needs to leave the bike lane to turn left is changing lanes like any driver, and following traffic should make room.
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6. Your power steering fails while you are driving. What happens and what should you do?
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Answer B: Steering becomes much harder but still works, so slow down and pull off the road
Without power assistance the steering still works, but it takes much more effort, especially at low speed. Keep both hands on the wheel and get off the road.
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7. Besides motorist services and tourist information, a blue sign background is also used for
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Answer B: evacuation route signing
Blue is assigned to road user services, tourist information and evacuation routes, so hurricane and other evacuation routes are signed in blue.
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8. As a center two-way left-turn lane reaches an intersection, the markings change into a single left-turn lane. What does that mean for you?
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Answer D: From that point it serves one direction only, so use it just to turn left
Where the shared lane becomes a marked turn bay it belongs to one direction of travel, and only vehicles making that left turn may occupy it.
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9. A driver passes this sign and the signal beyond it is already showing green. What is the safest response?
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Answer C: Ease off the accelerator and be ready to stop, because an indication that has been showing for a while is about to change
A signal that has been displaying the same indication for some time is close to changing, so arriving at a controlled speed with the brake covered is safer than accelerating to beat it.
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10. You have just had bad news and you feel very upset. What should you do?
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Answer B: Wait until you have calmed down, or else let somebody else drive
Strong emotion takes attention away from the road as surely as alcohol or fatigue, so it is a reason not to drive yet.
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11. You wait in the aisle with your signal on for a space that is about to be vacated. What is the risk?
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Answer D: You block the aisle and drivers behind may try to squeeze past
A stopped vehicle turns a two-way aisle into a bottleneck, and drivers who try to get around it pass close to pedestrians and reversing cars.
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12. You make eye contact with a driver waiting to pull out of a side street. What should you assume?
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Answer D: The driver may still not have seen you, so stay ready to slow or stop
Drivers can look directly at you and still not register your vehicle, especially a small one. Eye contact helps, but never rely on it.
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13. How should you follow a school bus in traffic?
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Answer A: Far enough back to see its lights and stop in time
A school bus stops often and with little warning, so a longer following distance gives you time to see the lights come on and stop clear of it.
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14. Traffic in a work zone is down to one lane in each direction, separated by a temporary double yellow line. May you pass?
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Answer C: No, temporary markings prohibit passing just as permanent ones do
A temporary marking has the same legal force as a permanent one, and a work zone is the last place with room to spare for an overtaking vehicle.
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15. You find that your shoulder belt has some slack in it. Why does that matter?
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Answer D: You travel further before the belt restrains you, so injuries are worse
Slack lets your body build up speed before the belt takes hold, which increases the forces on you and the risk of hitting the interior.
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16. Which combination best reduces the chance of hydroplaning?
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Answer D: Good tread depth, correct tire pressure and lower speed in the rain
Tread channels water away, correct pressure keeps the tire's shape, and lower speed gives the tire time to push water aside. Hydroplaning can begin at surprisingly modest speeds.
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17. At many crossings the walk indication appears only after a button is pressed. What happens if a pedestrian does not press it?
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Answer B: The signal may cycle without showing a walk indication
An actuated pedestrian phase is called in by the pushbutton, so without it the controller may serve the vehicle movements alone.
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18. You are involved in a collision, even a minor one. What is your first legal duty?
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Answer A: Stop at or near the scene without blocking traffic more than necessary
Every driver involved in a crash must stop at the scene, and leaving before meeting that duty is a serious offense. Move the vehicles only as far as needed to clear the traffic lanes.
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19. A delivery truck is parked in your lane and you must use the oncoming lane to get around it. Who has the right of way?
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Answer D: The oncoming traffic, because their lane is clear
The driver whose own lane is obstructed waits, because using the other lane is a favor from oncoming traffic, not a right.
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20. You arrive at an intersection with no signs, no signals and no markings at the same time as a vehicle on the road to your right. What must you do?
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Answer B: Yield to the vehicle on your right
At an uncontrolled intersection you must yield to a vehicle already in the intersection or approaching from your right.
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21. At a four-way stop another driver pulls out ahead of you when it was clearly your turn. What is the correct response?
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Answer B: Let that driver go through, then take your turn when the way is clear again
Right of way is something you give, never something you take, so yielding to a driver who takes it wrongly avoids a crash you would otherwise share.
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22. The crossing gates begin to lower while your vehicle is still on the railroad tracks. What should you do?
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Answer B: Keep going forward and push through the gate if it should block your way
Gates are made to break away, and driving forward off the tracks is far safer than staying between them or backing up.
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23. Why is standing water across a road dangerous even when it looks shallow?
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Answer B: It can hide a washed out roadbed, a deep hole or a missing cover
You cannot see the surface under the water, and floods commonly wash the roadbed away or lift covers off drains.
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24. What color scheme does a standard stop sign use?
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Answer B: White legend and border on a red background
The stop sign carries a white legend and border on a red background, the color set aside for stop, yield and prohibition messages.
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25. When should you enter a destination into a navigation device?
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Answer B: Before you start driving, or after parking in a safe place
Programming a route is a visual, manual and mental task at the same time, so it belongs to the moments before the vehicle moves rather than to any point in traffic.
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26. A sign with a brown background and a white legend guides road users to
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Answer B: parks, campgrounds and other recreational or cultural sites
Brown is reserved for recreational and cultural interest area signing, such as parks, historic sites and scenic areas.
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27. You are on a country road with no sidewalk and two people are walking toward you on your side of the shoulder. What should you do?
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Answer C: Slow down and move over to give them room
Where there is no sidewalk, people are expected to walk on the shoulder facing traffic, and drivers must slow and give them space.
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28. You are waiting to enter a two-lane roundabout and traffic is circulating in both lanes. What must you do?
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Answer A: Yield to traffic in both circulating lanes before you enter
Every entry to a roundabout is a yield point, and at a two-lane roundabout that means giving way to vehicles in either circulating lane.
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29. A disabled vehicle is blocking your lane on a two-lane road with a single solid yellow line on your side. What should you do?
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Answer C: Wait until the oncoming lane is clear, then go around carefully
The solid line prohibits overtaking a moving vehicle, but in most states a driver may go around an obstruction such as a disabled vehicle once the oncoming lane is clear and the move can be made safely.
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30. On a rural road, the driver of a slow farm tractor ahead of you signals a left turn even though there is no road or driveway in sight. What should you do?
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Answer B: Stay behind the tractor, because it may be turning into a field entrance
Farm equipment often turns into fields through gaps you cannot see, and it may swing wide to do so. Passing a vehicle that is signaling a left turn is a common cause of crashes.
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31. 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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32. You face a red light at an intersection that has no stop line and no marked crosswalk. Where must you stop?
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Answer C: Before entering the intersection
With no line and no crosswalk, the stopping point is the near edge of the intersecting roadway, close enough to see cross traffic but clear of it.
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33. Which of the four blind spots around a tractor-trailer is the largest?
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Answer A: The one on the right side of the truck
A truck has no-zones on all four sides, and the right-side blind spot is the largest because it runs back along the trailer and reaches across more than one lane.
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34. You are traveling at the same speed as a vehicle in the next lane, just behind its rear door. What should you do?
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Answer B: Change your speed so that you leave that driver's blind spot
That position is the classic blind spot. Slow slightly or move ahead so the other driver can see you before deciding to change lanes.
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35. You are stopped at an intersection where bushes block your view of cross traffic. What should you do?
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Answer A: Edge forward slowly until you can see, then proceed when clear
Creeping forward a little at a time lets you gain a view without committing to the crossing. Never enter an intersection you cannot see into.