Iowa Permit Practice Test 4
A fourth full-length Iowa practice test: 30 more questions with zero repeats from Tests 1–3 — including extra Iowa-specific rules. You need 80% correct to pass the real Iowa DOT Knowledge Test.
Tap an answer. The explanation opens so you can learn it, then go on. Keyboard: A–D or 1–4 to answer, then Enter or Space.
Question 1 of 30
1. Unless a sign posts another limit, the usual residential or city default in Iowa is:
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Correct answer: A. Iowa's typical unposted residential / city default is 25 mph. School zones and work zones drop lower. If houses line the street and no sign argues, start at 25 mph and watch the next plaque.
2. What is the three-second following rule in good weather?
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Correct answer: A. Pick a fixed mark. When the car ahead passes it, count one-thousand-one, two, three. You should not reach the mark sooner. That gap grows with speed. Double it in rain; triple it on ice. Testers treat this as the core distance question.
3. A vehicle in front of you is stalled on railroad tracks and will not restart. The crossing lights start to flash. What should you do?
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Correct answer: B. People beat cars. Evacuate at once and run toward the train at an angle so debris is less likely to hit you if the car is struck. Do not stand on the tracks. Restart attempts end when the lights start.
4. Which sign shape and color combination marks an interstate route?
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Correct answer: D. Interstate routes are marked by a shield split into a red band on top and a blue field below, with white numbers. Spotting the shield quickly helps you follow or avoid a freeway. Shield equals interstate.
5. A GPS in Iowa suggests 40 mph on a residential block with no posted limit. The handbook-style default you should prefer is:
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Correct answer: C. Apps guess; Iowa's default for this kind of street is 25 mph unless a sign posts otherwise. Believe the sign first, then the state's default, then the gadget.
6. You see a five-sided sign shaped like a schoolhouse outline, in fluorescent yellow-green, showing two walking figures. What does the pentagon shape identify?
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Correct answer: D. The pentagon shape is reserved for school signs, warning of a school zone or crossing where children may be walking. The fluorescent yellow-green color grabs attention near schools. Think of the five-sided shape as a little schoolhouse to remember it.
7. If your car stalls on a railroad track, what does NHTSA say to do first?
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Correct answer: A. Official NHTSA railroad-crossing guidance says If your car stalls on a track, quickly get everyone out — even if you don’t see a train coming. Run away from the tracks and your car to avoid being hit by flying debris. Call the number on the blue emergency notification system sign.
8. You are studying for the Iowa permit knowledge exam and want to schedule it as early as the law allows. You can hold a learner's permit beginning at which age?
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Correct answer: C. In Iowa, 14 is the earliest age for a learner's permit, so plan your knowledge exam around that date. Study the official handbook, since permit questions come from it, and arrive with the required documents ready.
9. What penalties does NHTSA list for impaired driving?
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Correct answer: A. Official NHTSA drunk-driving guidance says penalties for impaired driving can include driver’s license revocation, fines, and jail time. The leftover implied-consent chemical-test sentence is not on that page; this nearby official penalty list is.
10. You finished driver education and have held your Iowa instruction permit with a clean record for six straight months. At what age can you apply for the special minor's restricted license to drive yourself to school?
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Correct answer: B. Iowa's special minor's restricted license, often called the school license, opens at 14 1/2 for students meeting driver-ed and clean-permit requirements. It allows unsupervised trips to school by the most direct route. Hook: half a year past fourteen.
11. Under Iowa's zero-tolerance law, what BAC level counts as a violation for a driver under 21?
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Correct answer: B. Iowa's zero-tolerance law sets the under-21 threshold at 0.02%, far stricter than the adult standard. Underage drinking is illegal to begin with, so the safest and simplest rule is zero alcohol before driving.
12. You meet an Iowa school bus from the front on a four-lane highway. The bus has lights flashing and the stop arm out. Must you stop?
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Correct answer: A. Iowa says when meeting the bus in one of the opposite two lanes or more on a four-lane highway, you do not need to stop even if the bus has stopped with lights flashing and the stop arm out. That is the only time you may pass a stopped Iowa school bus. On a two-lane road you still stop.
13. You are low on fuel on a long highway drive. Signs of which color point you to services such as gas, food, lodging, and hospitals?
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Correct answer: B. Blue signs mark motorist services, including fuel, food, lodging, rest areas, and hospitals. They let travelers plan a stop before leaving the highway. When your body or your car needs something, look for blue.
14. You come to an intersection where the signal is flashing red. How should you treat it?
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Correct answer: D. A flashing red light works exactly like a stop sign: stop fully, yield to traffic and pedestrians, then proceed when the way is clear. Flashing red still means red, so a complete stop is required.
15. A brown sign with white recreation symbols appears beside the highway. What kind of information is it giving?
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Correct answer: B. Brown signs point to cultural and recreation destinations. They do not change the speed limit or right-of-way. Use them to find the park; keep obeying the white and yellow signs for the rules.
16. The posted limit is unchanged, but traffic, weather, and light have all gotten worse. What does the basic speed rule require?
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Correct answer: C. The basic speed rule says you may not drive faster than conditions safely allow, no matter what the sign posts. Rain, darkness, and crowds shrink your margin for error. Conditions set the real limit; the sign sets the ceiling.
17. After two drinks at a barbecue in Iowa, you consider driving home. For a driver 21 or older, that becomes illegal starting at which BAC?
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Correct answer: A. Driving in Iowa becomes a per-se DUI at a BAC of 0.08%. Drinks affect people differently, so you cannot reliably guess your number. When you have been drinking, the smart decision is simply to skip driving.
18. After a complete stop on red in Iowa, when may you turn left?
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Correct answer: A. Iowa says you may make a left turn at a red light if you are turning from the left lane of a one-way street onto a one-way street. Come to a complete stop and yield to all other traffic. A circular red is not a free left from a two-way street.
19. You park facing downhill on a street with a curb. Where should your front wheels point?
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Correct answer: C. When parking downhill with a curb, turn your front wheels toward the curb; if the car rolls, the tire wedges against the curb instead of drifting into traffic. Think downhill, dive toward the curb, and set the brake.
20. A yellow diamond sign shows a car with wavy skid marks trailing behind its tires. When does this warning matter most?
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Correct answer: D. The skidding-car sign warns that the road ahead becomes slippery when wet, so slow down and avoid sudden braking or sharp steering in rain, snow, or ice. The first minutes of rain are often the slickest, as water lifts oil off the pavement.
21. You are approaching an intersection and the traffic light turns steady red. What must you do?
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Correct answer: C. A steady red light requires a full stop before the stop line or crosswalk, or before entering the intersection if there is no line. Stopping at the line protects people crossing. Remember: red means stop, every time.
22. A 19-year-old is pulled over in Iowa after a party. Under the zero-tolerance law, what BAC is enough for an underage drinking-and-driving violation?
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Correct answer: D. For drivers under 21 in Iowa, a violation begins at 0.02%. Zero-tolerance laws exist because young, inexperienced drivers face high crash risk with any alcohol. If you are underage, the only legal amount is none.
23. How does the alcohol in a regular beer compare with a standard glass of wine or a single shot of liquor?
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Correct answer: B. A standard beer, glass of wine, and shot of liquor each deliver about the same alcohol, so switching drinks does not protect you. Your body counts drinks, not drink types. One is one, whatever the glass looks like.
24. When a vehicle with flashing lights is stopped on or next to a roadway, what does official NHTSA Move Over guidance say drivers should do?
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Correct answer: A. Official NHTSA Move Over guidance says all 50 states have Move Over laws. When a vehicle with flashing lights is stopped on or next to a roadway, drivers approaching the vehicle should change into a lane not immediately adjacent to the vehicle, or slow down to a reasonable speed if you’re unable to safely make a lane change.
25. What is the safest way to handle your speed through a sharp curve?
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Correct answer: B. Slow to a safe speed before the curve begins, then hold steady or gently accelerate through it. Braking mid-curve can break tire grip and cause a skid. Do your slowing on the straightaway, your steering in the bend.
26. You are passing a slow truck on a Iowa highway posted at the state's maximum limit. Even while passing, your legal ceiling stays at which speed?
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Correct answer: B. Passing grants zero extra speed allowance; in Iowa the ceiling on those top-posted highways stays 70 mph. If you cannot complete the pass within the limit, wait for a better gap. The limit binds every maneuver.
27. How does official NHTSA impaired-driving guidance define zero tolerance for underage drivers?
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Correct answer: A. Official NHTSA Uniform Guidelines for State Highway Safety Programs list Zero Tolerance for underage drivers, making it illegal “per se” for people under age 21 to drive with any measurable amount of alcohol in their system (i.e., .02 BAC or greater). State numbers still vary; this leftover uses that official national guideline sentence.
28. You are turning left at an intersection on a green light while an oncoming car heads straight toward the intersection. What is the rule?
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Correct answer: C. A driver turning left must yield to oncoming vehicles going straight or turning right, crossing only when there is a safe gap. Straight traffic keeps its speed and path, so the turning driver waits. Left turn equals lower priority.
29. In Iowa, what is the youngest age at which you can apply for a learner's permit?
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Correct answer: B. Iowa issues learner's permits starting at age 14. The permit opens the first stage of graduated licensing, where you build skills with a supervising adult before earning fuller privileges. Know your state's number; it varies nationwide.
30. What is the highest posted highway speed you should expect to see in Iowa?
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Correct answer: C. Iowa's top posted highway limit is 70 mph. Most roads are lower. Do not treat the state maximum as the speed for every freeway ramp or work zone.
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