Iowa DOT Permit Practice Test 10
Test 10 of 10. Pick an answer for each question to see if it is right and why; your score appears at the end. You need 20 correct answers to pass, the same ratio as the real Iowa test.
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age14 years
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1. How long is the Iowa revocation for a first drag racing conviction that caused no personal injury or property damage?
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Answer B: Six months
Iowa Code section 321.212 requires the department to revoke a license for six months for a first drag racing offense where the violation caused no personal injury or damage to property.
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2. A yellow curve warning sign carries a yellow plaque showing a speed. What does that number mean?
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Answer D: The recommended maximum safe speed for the curve under ideal conditions
An advisory speed plaque on a yellow warning sign gives the recommended maximum speed for the hazard ahead when conditions are good.
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3. You want to stop briefly and the only space is in the travel lane alongside a vehicle already parked at the curb. Is this allowed?
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Answer D: No, double parking blocks a travel lane and is prohibited
Stopping in the roadway beside a parked vehicle removes a lane from traffic and forces other drivers to swerve around you, which is why double parking is prohibited.
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4. How much more energy must your brakes absorb if you double your speed?
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Answer D: About four times as much, since energy rises with the square of speed
Kinetic energy grows with the square of speed, so twice the speed means about four times the energy and a far longer braking distance.
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5. After an Iowa officer removes the plates for lack of proof of coverage, how long may the vehicle still be driven, and for what purpose?
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Answer B: Up to forty-eight hours, solely to remove it from the highways of the state
Iowa Code section 321.20B allows the vehicle to be driven for up to forty-eight hours after the citation solely to remove it from the highways, with the citation kept in the vehicle as proof.
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6. Iowa classifies driver's licenses by letter. Which class authorizes operating a motor vehicle as a chauffeur?
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Answer B: Class D
Iowa Code section 321.189 defines a class D driver's license as valid for the operation of a motor vehicle as a chauffeur.
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7. Besides the holding period and the logged hours, what driving record does Iowa require before issuing a full driver's license to a seventeen-year-old?
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Answer A: No accidents or violations for the twelve months immediately preceding the application
Iowa Code section 321.180B requires the applicant to have been accident and violation free continuously for the twelve-month period immediately preceding the application for a full driver's license.
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8. 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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9. Traffic is backed up just past the exit you want to use at a single-lane roundabout. What should you do?
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Answer D: Wait at the yield line until you can pass through and exit
You must not enter a roundabout unless you can clear it, because stopping inside blocks every other entry.
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10. Your vehicle stalls on railroad tracks and you see a train approaching. What should you do?
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Answer D: Get everyone out and run toward the train at an angle away from the tracks
Leave the vehicle at once. Running toward the oncoming train and away from the tracks keeps you clear of the wreckage, which is thrown forward in the direction the train is moving.
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11. Once a driver has joined the route this sign begins, how is the rest of the way marked?
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Answer B: By further markers of the same kind at each turn, until the original road is rejoined
The alternate route is signed continuously, with a marker at every turn, so a driver with no local knowledge can follow it back to the original road.
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12. Which of these requires the Iowa DOT to revoke a driver's license?
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Answer D: Convictions on two charges of reckless driving
Iowa Code section 321.209 lists conviction, or forfeiture of bail not vacated, upon two charges of reckless driving among the offenses requiring mandatory revocation.
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13. What happens when alcohol is combined with another drug that also affects the nervous system?
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Answer B: Impairment is often far greater than either one alone would produce
Combined substances can multiply each other's effects, producing impairment well beyond what a driver would expect from either one taken separately.
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14. What happens to an Iowa motorized bicycle license when the holder is convicted of a moving traffic violation?
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Answer C: It is canceled, and the holder may reapply thirty days later
Iowa Code section 321.189 cancels a license valid only for a motorized bicycle upon a conviction for a moving traffic violation, and allows reapplication thirty days after the date of cancellation.
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15. Should you drive with your hazard lights flashing while moving in fog?
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Answer A: No, they hide your turn signals and suggest you are stopped
Hazard lights on a moving vehicle tell other drivers you are stopped or disabled, and they cancel out your turn signals just when clarity matters most.
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16. You feel drowsy, so you open a window and turn the radio up. What does that achieve?
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Answer B: Very little, because the drowsiness comes back
Cold air and loud music are not sleep, so the alerting effect lasts a minute or two and the driver is soon just as sleepy and closer to a lapse.
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17. Smoke and flames appear from the engine compartment after you stop. What should you do?
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Answer A: Get everyone well away from the vehicle first, and then call the fire service
A vehicle fire can spread within seconds, so people come out first and firefighting is left to the fire service.
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18. The car ahead of you slows down for no reason that you can see. Should you pull out and pass?
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Answer B: No, find out why it is slowing before you commit to the other lane
A driver usually slows for something, such as a turn, a hazard or a pedestrian, and that something is often exactly where your pass would take you.
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19. Iowa caps the highway speed of a self-propelled implement of husbandry with flotation tires used to apply plant food or agricultural chemicals. What is the cap?
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Answer C: 35 miles per hour
Iowa Code section 321.285 forbids operating such an implement on a highway at a speed in excess of thirty-five miles per hour, notwithstanding any other speed restriction.
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20. You see smoke coming from under the hood while driving. What should you do?
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Answer D: Signal, pull well off the road, shut off the engine and move everyone away from the vehicle
Stopping and shutting off the engine cuts the fuel supply to a possible fire, and distance protects you if it spreads. Raising the hood can feed the fire a rush of air.
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21. On a rural two-lane road you pass small blue signs, each naming one business with an arrow and a distance. What are they?
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Answer D: Tourist-oriented directional signs for traveler businesses
Tourist-oriented directional signs carry a white legend on blue and are used on rural conventional roads to guide travelers to eligible businesses.
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22. 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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23. A yellow pennant-shaped sign is posted on the left side of a two-lane road facing you. What is it telling you?
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Answer B: You are entering a no-passing zone and may not start a pass
The pennant is placed on the left so that it faces the driver who might pull out, and it marks the beginning of a no-passing zone.
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24. 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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25. An upward-pointing pentagon with a yellow legend and border on a blue background is used as
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Answer D: a county route marker
The pentagon serves both the school warning series and county route markers, and the blue background with yellow legend identifies the county route version.