Iowa DOT Permit Practice Test 40
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age14 years
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1. A driver who has been drinking has two cups of strong coffee. What has changed?
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Answer D: The driver is more awake but just as impaired
Coffee can make a drinker feel alert, but nothing except time removes alcohol from the blood, so a wide awake drinker is still an impaired driver.
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2. A driver extends the left arm out the window and bends it upward at the elbow. What does this signal mean?
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Answer B: A right turn
The left arm bent upward at the elbow is the standard hand signal for a right turn.
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3. Why is being predictable an important part of driving safely?
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Answer A: Because other road users are able to plan around what you are doing
Other drivers make their decisions from what they expect you to do, so surprises are what produce collisions.
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4. An emergency vehicle with flashing lights and a siren is approaching from behind on a two-way street. What should you do?
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Answer C: Pull over to the right edge of the road and stop until it passes
Clearing a path by pulling to the right and stopping gives the emergency vehicle a predictable route, while stopping in mid-lane or inside an intersection blocks that path.
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5. What is the basic rule for entering a roundabout?
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Answer B: Traffic already circulating goes first, and you wait for a gap
Entering traffic yields to vehicles already going around the circle, which is what keeps a roundabout moving instead of locking up.
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6. Which activity does Iowa law specifically exclude from the definition of voice-activated or hands-free use?
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Answer A: Engaging in a video call or video streaming
Iowa Code section 321.276 states that voice-activated or hands-free mode does not include engaging in a video call, video streaming, accessing nonnavigation video content, gaming data, or reading an electronic message.
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7. Your passengers are being noisy and you are losing concentration. What should you do?
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Answer B: Ask them to settle down, or pull over safely until they do
The driver is responsible for the conditions inside the vehicle, and stopping is always better than driving distracted.
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8. A yellow diamond showing a truck is posted beside a quarry entrance. What is it warning about?
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Answer A: Trucks turning onto the highway from that entrance
A truck crossing or trucks entering sign is used where heavy vehicles pull onto the road from a site, and they accelerate slowly once they are on it.
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9. You are starting from a stop on a snowy, icy street and the drive wheels begin to spin. What should you do?
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Answer C: Ease off the accelerator and start again more gently
Spinning tires polish the surface and dig in. Very gentle pressure on the accelerator, and a higher gear if you have one, gives the tires the best chance to grip.
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10. You are making a U-turn at a signal on a green left arrow. Who must you still watch for?
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Answer D: People in the crosswalk you will cross as you come around
Even a protected arrow does not clear the crosswalk, and a U-turn sweeps across a crosswalk that pedestrians may already be using.
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11. How long can cannabis affect a driver?
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Answer A: For hours after the strongest effects have passed
Slowed reactions, poor tracking and weak judgment of distance can last for hours, well beyond the point where the user believes the effects are over.
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12. A sign on a freeway restricts trucks to the two right-hand lanes. What should a car driver expect in those lanes?
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Answer A: More heavy vehicles and slower changes of speed
A truck lane restriction concentrates heavy vehicles on the right, and those vehicles accelerate, brake and change lanes far more slowly than cars.
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13. A school crossing guard steps into the roadway and holds up a stop paddle. What must you do?
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Answer D: Stop and stay stopped until the guard and the children have left the road
A crossing guard directs traffic with legal authority; you must remain stopped until both the guard and the children are clear of the roadway.
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14. You are entering an angle parking space on your right. What should you do?
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Answer C: Stay a little left of the space, then turn in between the lines
Keeping a little left of the space gives the front wheels the room to turn in cleanly and leaves your car centered between the lines.
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15. In slow summer traffic the temperature gauge climbs into the red. What should you do first?
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Answer A: Turn off the air conditioner and turn on the heater to draw heat from the engine
The heater core acts as an extra radiator, and shutting off the air conditioner reduces engine load. If the gauge keeps climbing, pull over and shut off the engine, and never open a hot radiator cap.
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16. You are approaching a narrow bridge where the road has one lane in each direction and no shoulder. What should you do about passing?
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Answer B: Do not pass on or near the bridge
A narrow bridge gives neither vehicle anywhere to go, so passing is prohibited there in the same way as on a hill or in a tunnel.
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17. A freeway sign reads BUSES ONLY ON SHOULDER 6 AM TO 9 AM. Who may drive on the shoulder then?
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Answer A: Only the vehicles named on the sign, during the hours shown
Shoulder running is granted by the sign to the class of vehicle and the hours the sign names, and it does not turn the shoulder into a general travel lane.
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18. An overhead lane-use control signal shows a steady red X above your lane. What does it mean?
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Answer B: You may not use that lane and must move out of it
A steady red X means the lane below it is closed to you, while a steady yellow X is the warning to prepare to vacate the lane and a downward green arrow means the lane is open.
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19. 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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20. You reach a red light with a sign reading NO TURN ON RED. What may you do?
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Answer D: Wait for the green; no turn is allowed while the light is red
That sign removes the usual permission to turn on red at the intersection, so you must wait for a green indication.
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21. How should you position your vehicle for a right turn from a two-way street?
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Answer B: As close as practical to the right curb or edge, then turn into the nearest right lane
Right turns are made from the lane nearest the right edge into the nearest available lane, which keeps the turn tight and prevents a wide sweep into other traffic.
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22. Why is it often safer to back into a parking space than to back out of one?
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Answer D: Because you leave the space going forward, with a clear view
Backing into the space puts the difficult maneuver where you are stopped and looking around, and lets you drive out facing the traffic and pedestrians.
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23. Why should you avoid parking over tall dry grass or a pile of dead leaves?
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Answer B: Because the hot exhaust can set the dry material on fire
The exhaust system stays hot for a long time after a drive and can ignite dry vegetation underneath the vehicle.
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24. You are behind three slow vehicles on a two-lane road and the way ahead looks clear. What is the sound decision?
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Answer D: Pass one vehicle at a time, if the road allows it
Passing several vehicles in one move keeps you in the oncoming lane far too long and leaves nowhere to go if a vehicle appears.
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25. Why is this restriction used so often on a divided road just before a crest or a bend?
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Answer A: Because a vehicle turning across the median there stays hidden from approaching drivers until it is too late
The maneuver needs a long gap and good visibility, and where sight distance is short an approaching driver has no time to react to a vehicle turning across the road.