Iowa DOT Permit Practice Test 18
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age14 years
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1. You are inside a tunnel with no shoulder when an ambulance comes up behind you with lights and siren. What should you do?
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Answer D: Keep going at a safe speed and pull over once you are clear of the tunnel
Stopping in a tunnel or on a narrow bridge blocks the only lane, so continue at a safe speed to the first place where you can pull clear.
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2. In which situation should you increase your usual following distance?
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Answer B: On wet roads, at night, in fog, when towing a trailer, or when following a motorcycle
Reduced traction, reduced visibility, a heavier load and a vehicle that can stop faster than yours all require extra space to keep the same margin of safety.
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3. Is it acceptable to watch a video on a screen positioned where you can see it while driving?
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Answer B: No, the screen pulls your eyes and attention away from the road
Moving pictures are among the strongest visual distractions. Video screens must be out of the driver's view while the vehicle is moving.
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4. A yellow diamond shows an arrow that doubles back on itself. What kind of curve lies ahead?
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Answer C: A turn of 135 degrees or more, nearly doubling back
The hairpin curve sign is used where the road changes direction by 135 degrees or more, and it is normally backed up by chevrons or a large arrow through the bend.
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5. A driver ahead brakes for no reason you can see, again and again. What should you do?
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Answer B: Increase your following distance and be ready for yet another stop
Unexplained braking tells you the driver is unsure or distracted, so the safe answer is more room, not less.
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6. A driver extends the left arm out the window and points it downward toward the road surface. What is being signaled?
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Answer A: Slowing down or stopping
The left arm extended downward is the standard hand signal for slowing or stopping.
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7. A child in the back seat unfastens a seat belt while you are on the freeway. What should you do?
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Answer A: Pull off safely and refasten the belt
Turning or reaching back takes your eyes and hands off a high speed task, so leave the freeway or use the shoulder only if there is no exit, then fix the belt.
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8. 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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9. Where is the safest place for children under 13 to ride?
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Answer C: In the back seat
The back seat keeps children away from the force of a deploying front air bag and is farther from the most common impact area, which is why it is recommended through at least age 12.
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10. You are driving at night on an unlit road using low beams. How should you choose your speed?
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Answer C: So you could stop within the distance your headlights light up
Driving faster than you can stop within the lit area is called overdriving your headlights. Anything beyond the beam is invisible until it is too late to react.
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11. You are pulling out of a farm entrance onto a rural highway. What is your obligation?
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Answer C: Yield to every vehicle already on the highway before you enter the roadway
A driver entering a highway from a private road or driveway yields to every vehicle already on the highway.
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12. The inside of your windshield keeps fogging up on a cold, damp day. What clears it best?
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Answer B: The defroster with the air conditioning on, which dries the air
Fog on the inside is moisture from the cabin air. The air conditioner dries that air, and the defroster warms the glass, so together they clear it and keep it clear.
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13. You are approaching a horse and rider on a country road. What about your horn?
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Answer C: Do not sound it at all, because the noise can frighten the animal
A startled horse is dangerous to its rider and to you, so pass wide and slow and leave the horn alone.
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14. A yellow sign reading DEAD END is posted at the entrance to a street. What does it mean?
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Answer D: The street ends and there is no way through
A dead end street stops at its far end, so a driver who enters must come back out the same way.
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15. You are turning onto a street that has two lanes going your way. Which lane should you enter?
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Answer B: The lane closest to you, changing lanes later if you need to
Turn into the nearest lane going your direction and make any lane change afterwards, when you have signaled and checked that it is clear.
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16. At a rural intersection a beacon flashes yellow toward the main road and red toward the side road. How is each approach treated?
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Answer A: The main road slows and proceeds, the side road stops
An intersection control beacon assigns flashing yellow to the road with priority and flashing red to the approach that must stop and yield.
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17. Besides emergency, tow, utility and maintenance vehicles, which stationary vehicle triggers Iowa's move over duty?
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Answer A: Any vehicle continually displaying its emergency signal lamps flashing simultaneously
Iowa Code section 321.323A applies the lane change or slow down duty to any stationary motor vehicle that is continually displaying its emergency signal lamps flashing simultaneously.
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18. What belongs in a basic emergency kit carried in a car?
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Answer D: A flashlight, a first aid kit, jumper cables and some warning devices
A useful kit lets you see, be seen, treat an injury and restart the vehicle; carrying loose gasoline is a fire risk.
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19. What change in the road does this sign announce?
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Answer B: The two directions of travel are about to be separated, and the driver must keep to the right of the separation
Ahead the roadway splits into separate one-way roadways on either side of a median, so the driver stays to the right of the divider and no longer meets oncoming vehicles.
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20. 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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21. You notice that the driver ahead of you is holding a phone to the ear. What should you do?
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Answer C: Assume slower reactions and leave extra space, or else hold back
A driver on the phone reacts late and misses things, so the safe response is distance rather than a lesson.
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22. The circular sign shape is reserved for which warning?
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Answer C: Advance warning of a highway-rail grade crossing
A round yellow sign with a black X and the letters RR is the grade crossing advance warning sign, and the circular outline is used for no other message.
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23. The lights at a highway-rail grade crossing begin to flash red as you approach. What must you do?
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Answer B: Stop short of the tracks and wait until the lights stop and no train is near
Flashing red lights at a crossing require a stop clear of the tracks, and you may proceed only once the lights have stopped, any gates are fully raised and no train is approaching.
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24. How should the outside mirrors be aimed to reduce your blind spots?
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Answer A: Outward, so each one covers the lane beside you rather than repeating the inside mirror
Mirrors aimed too far inward show you the same road three times and leave a large gap beside the vehicle, so aiming them outward shrinks the blind spot.
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25. A square sign with a red field, a wide white horizontal bar and the words DO NOT ENTER tells a driver that
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Answer B: the roadway ahead must not be entered from that point
The do not enter sign is posted at the end of a one-way roadway or ramp to keep traffic from driving into it against the flow.