Missouri Permit Practice Test 4
A fourth full-length Missouri practice test: 30 more questions with zero repeats from Tests 1–3 — including extra Missouri-specific rules. The real DOR Written test (part of the four-part Missouri driver examination, which also includes vision, road sign, and driving tests) has 25 questions, and you need 20 correct (80%) to pass.
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. What does NHTSA say texting does to your eyes on the road?
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Correct answer: A. Official NHTSA distracted-driving guidance says Sending or reading a text takes your eyes off the road for 5 seconds. At 55 mph, that is like driving the length of an entire football field with your eyes closed. Distracted driving is any activity that diverts attention from driving.
2. 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.
3. A white regulatory sign reads NO TURN ON RED. You have a circular red light and want to go right. What must you do?
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Correct answer: B. NO TURN ON RED cancels the usual after-stop right turn. Wait for green. Cities post this where pedestrians or poor sightlines make a red-light turn dangerous. The sign overrules the general permission.
4. In Missouri, a driver who is 21 or older commits a per-se drunk-driving offense once their blood alcohol concentration reaches which level?
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Correct answer: B. 'Per se' means the number alone proves the offense. In Missouri, that number is 0.08%. No other proof of bad driving is needed at that level, and alcohol can still impair you below it.
5. What would a NHTSA brake-throttle override require when a pedal is stuck?
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Correct answer: A. Official NHTSA FMVSS 124 NPRM text says a brake-throttle override (BTO) system would require that input to the brake pedal in a vehicle must have the capability of overriding input to the accelerator pedal. The leftover shift-to-neutral mnemonic is not on that page; this nearby official stuck-accelerator rulemaking sentence is.
6. A white sign with a black arrow bending left and the word ONLY is over your lane. What does it require?
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Correct answer: B. A black arrow plus ONLY assigns that lane to one movement. If you need to go straight, change lanes before the marking. Lane-control signs win over habit; follow the arrow you are sitting under.
7. A 17-year-old in Missouri claims, 'I only need to stay under the adult limit.' Under zero tolerance, the BAC that actually applies to under-21 drivers is what?
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Correct answer: C. The adult limit is irrelevant for minors. Missouri's zero-tolerance law applies at 0.02% for drivers under 21, because any alcohol raises a new driver's crash risk. If you are under 21, drinking and driving do not mix.
8. If you fail the Missouri written test in the morning, what does the State Highway Patrol allow?
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Correct answer: C. Missouri's Highway Patrol lets you take the written test up to two times per day, returning on later days until you pass. There is no long lockout, so review your weak spots and try again. Hook: two tries per sunrise.
9. A classmate insists everyone must wait until 18 to start driving in Missouri. The real minimum age for a learner's permit is which of these?
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Correct answer: D. Your classmate is wrong: Missouri grants learner's permits at 15. Starting earlier gives you months of supervised practice while risk is lowest. When rules feel fuzzy, confirm them in the official state driver handbook.
10. A tire blows out at highway speed. What should you do first?
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Correct answer: B. A blowout pulls the car; your job is to keep it pointed straight while speed drops. Hard braking can spin you. Once you are slow and under control, signal and move off the pavement. Hold, ease, then brake.
11. While you wait to turn, the green arrow changes to a steady yellow arrow. What is the signal telling you?
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Correct answer: D. A steady yellow arrow warns that the protected turning phase is about to end. Stop if you can do so safely; drivers already at the point of no return may finish the turn cautiously. Yellow arrow means wrap up, not speed up.
12. An ambulance with flashing lights and a siren comes up behind you on a two-way street. What should you do?
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Correct answer: C. When an emergency vehicle approaches with lights and siren, pull to the right edge of the road and stop, avoiding blocking intersections. A predictable move to the right opens a clear lane. Everyone right, everyone stopped, help gets through.
13. What does a posted speed limit actually tell you?
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Correct answer: A. A posted limit is the top legal speed when conditions are ideal: dry pavement, good visibility, light traffic. In worse conditions, a safe speed is lower. Treat the number as a ceiling to stay under, not a target to hit.
14. You are making a study calendar for the Missouri knowledge test. You can hold a learner's permit beginning at which age?
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Correct answer: B. Put 15 on the calendar for Missouri. That is the first legal day for a learner's permit, after you pass the knowledge and vision screens the DOR requires.
15. What is the highest posted highway speed you should expect to see in Missouri?
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Correct answer: C. Missouri'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.
16. Can prescription or over-the-counter medicine make driving illegal, according to NHTSA?
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Correct answer: A. Official NHTSA drug-impaired-driving guidance says it’s illegal everywhere in America to drive under the influence of alcohol, marijuana, opioids, methamphetamines, or any potentially impairing drug–prescribed or over the counter.
17. A Missouri signal shows a steady red arrow. What must you do?
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Correct answer: A. Missouri says a steady red arrow tells you to stop at the stop line, crosswalk, or before the intersection and wait for the signal to turn green or a flashing yellow arrow. Protected-turn arrows do not become yield-and-go just because you stopped once.
18. A GPS in Missouri 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; Missouri'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.
19. Along a curb you see a white sign with a large letter P inside a red circle and slash. What does it tell you?
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Correct answer: C. A P covered by a red circle and slash is the international no-parking symbol, banning parking where the sign applies. It keeps curbs clear for visibility, hydrants, and traffic flow. Any symbol wearing the red slash is something you cannot do.
20. 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.
21. A pedestrian in Missouri is guided by a dog or carrying a white cane, which may have a red tip. What must vehicles do?
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Correct answer: A. Missouri says when a pedestrian is crossing a street or highway guided by a dog or carrying a white cane, or a white cane with a red tip, vehicles must come to a complete stop. Drivers must also yield when a pedestrian is already in the crossing. A horn startles someone using sound to navigate.
22. Setting cruise control on a rural Missouri interstate posted at the state maximum, you should set it no higher than which speed?
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Correct answer: B. The state maximum in Missouri is 70 mph, so cruise control should not be set above it where that limit is posted. Think of the posted limit as a ceiling for ideal conditions, not a required speed.
23. Under normal conditions, what is the slowest you may legally drive on a Missouri interstate highway?
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Correct answer: D. Missouri sets a 40 mph minimum on interstate highways in normal conditions because vehicles crawling far below traffic speed trigger sudden braking and rear-end crashes. If 40 mph feels too fast for your vehicle or trip, choose another route.
24. 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.
25. You approach an intersection with no signs or signals, and another vehicle approaches from a cross street at about the same time. Who should yield?
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Correct answer: A. At an uncontrolled intersection, slow down and yield to any vehicle that reaches it at about the same time from your right. Without signs, this default rule sorts out conflicts. Same tiebreaker as a four-way stop: right goes first.
26. You turn onto a quiet Missouri street lined with houses and no speed sign. Unless a local rule posts something else, the usual default is:
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Correct answer: B. Unposted residential streets in Missouri are generally 25 mph. Watch for school and work-zone drops. When houses line the road and no sign argues otherwise, think 25 mph.
27. What first winter-driving step does NHTSA list on a slick surface?
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Correct answer: A. Official NHTSA winter-driving guidance says Slow down. It’s harder to control or stop your vehicle on a slick or snow-covered surface. The leftover hard-brake-on-bridge sentence is not on that page; this nearby official slick-surface rule is.
28. You are in the right lane when you see a yellow diamond sign showing the right lane narrowing into the left lane. What should you do?
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Correct answer: B. A lane-ends sign warns your lane will disappear, so signal, match the other lane's speed, and merge before the pavement runs out. Drivers in the ending lane must yield to through traffic. Early, smooth merges prevent the last-second squeeze.
29. Why is it illegal to park on a sidewalk or in a crosswalk?
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Correct answer: B. Sidewalks and crosswalks are reserved walking space; a parked car there pushes pedestrians, strollers, and wheelchairs out into traffic lanes. The law keeps walking paths continuous and safe. If people walk there, your car does not belong there.
30. A work zone is posted 45 mph with workers on foot beside the cones. Why should you treat that number as a hard ceiling?
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Correct answer: A. Work-zone limits protect people standing inches from traffic, and many states double the fine. Slow to the posted number before the first cone. Orange zone, orange alert: the speed is real and the penalty is steeper.
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