Missouri DOR Permit Practice Test 52
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age15 years
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1. You are driving at night on an unlit road using low beams. How should you choose your speed?
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Answer C: So you could stop within the distance your headlights light up
Driving faster than you can stop within the lit area is called overdriving your headlights. Anything beyond the beam is invisible until it is too late to react.
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2. A driver's blood alcohol concentration is below the legal limit, but the driver is visibly impaired. Can the driver be arrested?
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Answer C: Yes, driving while impaired by alcohol is an offense at any concentration
The per se figure, 0.08 percent in most states and 0.05 percent in Utah, is the level at which impairment is presumed. Impairment shown by driving behavior and field tests is enough on its own, because alcohol affects skills well before that number.
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3. A vehicle is sitting in your blind spot and you need to change into that lane. What should you do?
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Answer B: Adjust your speed to open a clear gap, then check again and move over
Changing your speed either drops the other vehicle behind you or lets it move ahead, which turns the blind spot back into open space.
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4. Why is dusk one of the harder times of day to drive?
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Answer B: The failing light blurs shapes into the background
In fading light there is not enough contrast to pick objects out, yet it is not dark enough for headlights to do the work, so pedestrians and cyclists disappear.
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5. The street you are turning right onto has a bike lane along its right edge. Where should your vehicle end up?
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Answer B: In the first traffic lane to the left of the bike lane
A bike lane is not a travel lane for motor vehicles, so the nearest lane you may finish a right turn in is the first general traffic lane beside it.
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6. You have a green arrow to turn left. What still applies?
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Answer D: You must yield to any pedestrian or vehicle still inside the intersection
A green arrow protects your turn from conflicting traffic, but you must still let anyone already in the intersection get clear before you move.
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7. You have a small extinguisher and a fire has started under the hood. What is the safe way to use it?
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Answer B: Release the latch and spray through the gap without raising the hood at all
Opening the hood feeds the fire a rush of air, so spraying through the gap at the base of the flames is both safer and more effective.
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8. When does a public utility vehicle count as an emergency vehicle under Missouri's move over law?
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Answer A: While it is performing emergency service
Missouri includes a vehicle owned and operated by a public utility or public service corporation while it is performing emergency service.
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9. A motorcycle ahead of you is weaving slightly as it crosses a stretch of grooved pavement. What should you do?
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Answer D: Give the rider extra room until the surface improves
Grooves, metal plates and loose material affect a motorcycle far more than a car, so back off and let the rider deal with the surface.
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10. Your vehicle has broken down at night on a rural road and your phone has no signal. What is the safest thing to do?
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Answer C: Stay with the vehicle, keep the hazard lights on and wait for help
A lit vehicle is far easier to find than a person walking in the dark, and running the engine while you sleep risks carbon monoxide.
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11. How should a long trip be broken up to keep the driver alert?
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Answer D: Stop for a break every couple of hours and share out the driving
Regular breaks and a change of driver are the only reliable answers to fatigue; caffeine only postpones it.
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12. The driver ahead of you is straddling the lane line and is not signaling. How should you respond?
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Answer B: Stay back until you can see which lane that driver will take
A vehicle astride the line could move either way, so the only safe place is behind it where both possibilities are still covered.
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13. How long should a glance at a mirror or an instrument take?
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Answer A: A brief glance of about a second, returning your eyes to the road at once
Checks should be quick flicks of the eyes. At highway speed, a few seconds with your eyes off the road covers a distance long enough for a hazard to appear.
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14. Visibility drops suddenly and you decide to leave the highway. What is the safest way to do it?
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Answer A: Take the next exit or a wide pull off, well clear of the traffic lanes
Get right off the traveled way, and off the shoulder too if you can, because vehicles in poor visibility often drift onto the shoulder.
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15. You have stopped on the shoulder of a highway and want to rejoin the traffic. What is the correct way?
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Answer D: Signal, build up speed along the shoulder, then merge into a gap
Entering a fast lane at a slow speed is what causes the conflict, so the shoulder is used to gain speed before the merge in the same way as an acceleration lane.
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16. When does the Missouri Department of Revenue mail a point accumulation advisory?
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Answer B: After 4 points in 12 months
Missouri sends a point accumulation advisory letter once a driver reaches four points within a twelve-month period.
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17. You reach a stretch of road covered by moving flood water of unknown depth. What is the correct decision?
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Answer D: Turn around and take another route
About a foot of moving water is enough to carry away most cars, and the roadbed under the water may already be washed out, so the only safe choice is to turn around.
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18. During which period may a Missouri vehicle use studded snow tires?
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Answer C: November 1 through April 1
Missouri permits studded snow tires only from November 1 to April 1.
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19. A front tire blows out at highway speed. What should you do?
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Answer B: Hold the wheel firmly, ease off the accelerator and slow gradually before leaving the road
A blowout pulls the vehicle toward the failed tire, and hard braking or sharp steering can turn that pull into a spin, so a firm grip and gradual slowing keep the vehicle straight.
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20. How does alcohol change the time a driver needs to respond to a hazard?
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Answer A: It slows it, so stopping takes longer
Alcohol is a depressant that lengthens the time between seeing a hazard and acting on it, which adds directly to the distance needed to stop.
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21. A law enforcement officer is directing traffic and waves you forward while the signal facing you shows red. What should you do?
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Answer A: Follow the officer's direction and proceed
Directions given by an officer controlling traffic take priority over signals, signs and pavement markings.
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22. What does a booster seat do for a child?
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Answer B: It lifts the child so that the adult belt crosses hips and shoulder
A booster raises the child so the adult belt lies on the strong parts of the body instead of the neck and the abdomen.
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23. The engine dies at speed and the dashboard lights go out on a dark road. What should you do?
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Answer C: Hold the wheel firmly, steer over to the shoulder and use the hazard lights
Never switch the ignition to lock, because the steering can lock; steer to the shoulder and warn traffic with the hazard lights.
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24. A steady downward green arrow is displayed over a lane. What does it indicate?
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Answer C: The lane is open to traffic in your direction
A steady downward green arrow means the lane it points to is open to traffic traveling in your direction.
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25. You are on an entrance ramp joining a busy freeway. What should you do with your speed in the acceleration lane?
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Answer D: Build it up to about the speed of the traffic you are joining
Merging works when your speed matches the traffic stream, because a large speed difference forces the drivers already on the freeway to brake or swerve.