Iowa Permit Practice Test 3
A third full-length Iowa practice test: 30 more questions with zero repeats from Tests 1 or 2 — 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. Your younger sibling asks when they can get a learner's permit in Iowa. What age do you tell them?
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Correct answer: A. Tell them 14; that is when Iowa allows a learner's permit application. Until then, driving on public roads is off the table. Graduated licensing phases in privileges so new drivers gain experience under lower-risk conditions.
2. A visually impaired person with a white or red-tipped cane or a guide dog is walking close enough to be in danger in Iowa. What should you do?
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Correct answer: A. Iowa groups a visually impaired person with a cane—often white or red-tipped—or a guide dog with the other stop situations when that person is in front of you or close enough to be in danger. Yield fully. A horn startles someone using sound to navigate.
3. An Iowa flashing yellow arrow is showing for a left turn. What must you do?
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Correct answer: A. Iowa’s signal chart says a flashing yellow arrow means yield to oncoming traffic and pedestrians, then turn left with caution. Oncoming traffic has a green light. That is the opposite of a steady green arrow, which holds opposing traffic.
4. The vehicle ahead displays an orange triangle with a red border on its rear. What does that tell you?
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Correct answer: D. The orange triangle is the slow-moving vehicle emblem, common on farm equipment and horse-drawn wagons. You close in on these vehicles faster than you expect, so back off early and pass only with a clear, legal gap.
5. Children are playing near the curb on an unposted neighborhood street in Iowa. Unless a sign says otherwise, the fastest you may legally drive here is which speed?
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Correct answer: A. The default residential limit in Iowa is 25 mph unless otherwise posted. With children nearby, you should often go slower still, because stopping distance grows quickly with speed and kids can dart into the street without warning.
6. At the top of a ramp you see a square sign with a red circle and a white horizontal bar reading DO NOT ENTER. What does it mean?
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Correct answer: A. DO NOT ENTER marks a roadway where traffic flows toward you, such as an exit ramp or one-way street. Entering it risks a head-on crash. If you have already turned in and see WRONG WAY, pull over and turn around safely.
7. If a state legalizes marijuana possession, may you drive under the influence of the drug?
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Correct answer: A. Official NHTSA drug-impaired-driving guidance says Even in states where marijuana laws have changed, it is still illegal to drive under the influence of the drug. Driving impaired by any substance is against the law in all 50 states and the District of Columbia.
8. A yellow diamond shows a bicycle and the words SHARE THE ROAD. What is it asking you to do?
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Correct answer: B. Share-the-road warnings remind you that bicyclists are legal traffic. Slow, wait for a clear gap, and pass with generous space. The sign exists because drivers otherwise squeeze bikes toward the gutter.
9. Several vehicles reach a four-way stop at different times. Who has the right-of-way?
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Correct answer: B. At an all-way stop, the vehicle that arrives and stops first proceeds first, with others following in arrival order. This first-come, first-served system prevents confusion. Think of it as taking a number at a busy counter.
10. How much stopping room does FMCSA say large trucks and buses need?
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Correct answer: A. Official FMCSA passenger-vehicle guidance says Large trucks and buses need the length of up to two football fields to safely stop. Leave extra space when merging in front of these large vehicles, to give them the stopping space they need.
11. A freeway on-ramp has a recommended speed of 35 mph on a yellow plaque. The freeway is posted 65. What should you do on the ramp curve?
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Correct answer: B. Yellow advisory speeds mark ramps and curves that cannot be taken at the highway limit. Slow for the curve, then speed up in the acceleration lane. Advisory plaques are the voice of physics, not decoration.
12. Which parking spot is illegal no matter how briefly you plan to stay?
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Correct answer: D. Parking within the cleared space around a fire hydrant is illegal, because firefighters may need instant access to connect hoses. Blocking a hydrant can cost lives during a fire. If you see a hydrant, leave the whole area open.
13. An Iowa circular yellow is showing and you can still stop safely. What does the manual say about entering?
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Correct answer: A. Iowa says do not enter the intersection if you can stop safely on yellow. If you are already in, complete the left or right turn. The same “do not enter if you can stop” line appears for a yellow turn signal about to go red.
14. Your 20-year-old cousin is the designated driver tonight in Iowa. To obey the zero-tolerance law, they must keep their BAC below what threshold?
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Correct answer: A. In Iowa, drivers under 21 violate the zero-tolerance law once their BAC reaches 0.02%. A true designated driver drinks nothing at all; that is the whole job, and it keeps every passenger legally and physically safe.
15. You are making a study calendar for the Iowa knowledge test. You can hold a learner's permit beginning at which age?
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Correct answer: B. Put 14 on the calendar for Iowa. That is the first legal day for a learner's permit, after you pass the knowledge and vision screens the Iowa DOT requires.
16. BAC measures the percentage of alcohol in a person's blood. For drivers 21 and older in Iowa, what BAC puts them at or over the legal limit?
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Correct answer: C. BAC stands for blood alcohol concentration. In Iowa, adult drivers reach the illegal level at 0.08%. Remember the rule as a hard line: at 0.08% you are over, and skills like reaction time fade even sooner.
17. A signal shows a flashing yellow arrow for a left turn. What does that allow?
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Correct answer: A. A flashing yellow arrow is a yield-and-turn: you may go left after judging gaps, because oncoming traffic still has a green. It is not a protected arrow. Flash yellow means you choose the gap; solid green arrow means the gap is held for you.
18. Traffic around you on a Iowa highway posted at the state maximum starts flowing faster than the signs allow. Your personal legal limit remains which speed?
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Correct answer: C. Other drivers speeding does not raise your limit; on Iowa's fastest highways it stays 70 mph. Move right and let them pass instead of matching them. Speed limits bind each driver individually, whatever the surrounding traffic does.
19. A passenger claims some Iowa highways have unlimited speed like the German autobahn. In reality, the state's highest legal limit is which of these?
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Correct answer: D. Every road in Iowa has a limit, and the statewide ceiling is 70 mph on designated highways. Higher speeds multiply crash energy dramatically, so no US state allows unlimited speed. Follow whatever limit is actually posted.
20. How does NHTSA describe the graduated driver licensing system?
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Correct answer: A. Official NHTSA GDL guidance says GDL is a three-phase system for beginning drivers, consisting of a learner’s permit, an intermediate license, and a full license. GDL allows beginning drivers to acquire driving experience in less-risky situations and under direct supervision during the learner’s permit phase.
21. You are on a through street. A driver on a driveway to your right is waiting to enter. Who must yield?
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Correct answer: B. Drivers leaving a driveway, alley, or parking lot yield to all traffic on the street, including bikes and people walking. The street already has the flow. Think: entering traffic waits; through traffic keeps moving unless a sign says otherwise.
22. Headed downhill at a curb, which way does the official CA handbook (nationally taught hill technique) turn the front wheels?
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Correct answer: A. Official California Driver Handbook parking technique — taught the same way nationwide — says Headed downhill: Turn your front wheels into the curb or right toward the side of the road. Remember to set the parking brake and leave the vehicle in park, or in gear for manual transmission.
23. Your car starts to skid on a wet curve. What is the first correct response?
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Correct answer: B. In a skid you need the tires to grip again: ease off the gas, avoid a hard stab at the brake if you can, and steer toward your intended path. Sudden inputs make the slide worse. Slow hands, slow feet, look where you want to go.
24. A white vertical rectangle reads SPEED LIMIT 55. What does that number legally mean?
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Correct answer: C. A white rectangular speed limit sign is a regulatory sign, so the number is the maximum lawful speed in ideal conditions. Rain, fog, or heavy traffic can make even that speed illegal. Treat the posted number as a ceiling, not a target.
25. Drivers under 21 in Iowa are over the youth alcohol limit at which level?
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Correct answer: A. Iowa uses a zero-tolerance style rule for under-21 drivers: 0.02%. Adult limits do not apply to a teen permit holder. If you are under 21 in Iowa, treat alcohol and keys as incompatible.
26. A yellow diamond shows a truck tipping on a curved arrow. What should you do before the curve?
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Correct answer: B. The tipping-truck symbol marks a curve or ramp with a recommended lower speed for high-center vehicles — and a wise lower speed for everyone. Slow before you enter the curve, not in the middle of it.
27. An 18-year-old in Iowa has one beer at a graduation party and then drives. At what BAC could this driver already be violating the zero-tolerance law?
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Correct answer: C. One beer can push a young driver to 0.02%, the level where Iowa's zero-tolerance law kicks in. The rule protects new drivers, whose crash risk rises quickly with alcohol. Skip every drink if you plan to drive.
28. A solid white line, instead of a broken one, separates your lane from the next lane going the same way. What is it telling you?
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Correct answer: A. A solid white line between same-direction lanes discourages lane changes, and it appears where drifting is risky, such as near intersections and ramps. The firmer the line looks, the firmer the message: hold your lane.
29. If coffee is not enough, what short-term drowsy-driving step does NHTSA list?
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Correct answer: A. Official NHTSA drowsy-driving guidance says Drinking coffee or energy drinks alone is not always enough. They might help you feel more alert, but the effects last only a short time. Pull over for a short 20-minute nap in a safe place.
30. At a BAC of .02, what typical effect does NHTSA list first?
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Correct answer: A. Official NHTSA drunk-driving guidance says .02 Some loss of judgment; relaxation, slight body warmth, altered mood. Testers invent leftover first-skill folklore. Learn that official wording, then answer the knowledge test from those words.
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