Missouri DOR Permit Practice Test 47
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age15 years
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1. Besides a chemical test, what else supports an impaired driving charge?
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Answer B: The officer's observations of the driving and the driver
Weaving, slow responses, speech and balance observed by the officer are evidence in their own right, which is why a driver can be charged on behavior alone.
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2. You have finished a distracting task and your eyes are back on the road. What is true?
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Answer A: Your full attention takes a while to come back
Studies of drivers show attention lags behind the eyes for many seconds after a phone or a screen task, so the danger continues after the task is over.
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3. You are approaching a traffic light that has been green for a long time. How should you treat it?
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Answer C: Expect it to change and be ready to stop
A light that has been green for a while is called a stale green light. Cover the brake and decide in advance where you could still stop safely.
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4. How should a head restraint be adjusted?
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Answer D: So the top is at least as high as the back of your head and close behind it
A restraint set at head height and close behind limits how far the head snaps backward in a rear impact, which is what reduces neck injury.
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5. Should you drive with your hazard lights flashing while moving in fog?
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Answer A: No, they hide your turn signals and suggest you are stopped
Hazard lights on a moving vehicle tell other drivers you are stopped or disabled, and they cancel out your turn signals just when clarity matters most.
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6. You signaled a lane change and the signal did not switch itself off afterwards. Why does that matter?
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Answer B: Other drivers may act on a turn you do not intend to make
A signal left on tells other drivers you are about to turn, and someone may pull out in front of you. Cancel it as soon as the maneuver is finished.
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7. On a narrow residential street, why does parking tight against the curb matter so much?
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Answer C: Because fire trucks and ambulances need the width to get through
Cars parked even a foot out from the curb on both sides can narrow a street until a fire truck or ambulance cannot pass.
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8. A Missouri driver at fault in a crash does not pay for the damage caused. What happens?
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Answer D: The license and plates are suspended for one year
Missouri suspends the driver license and license plates for one year when an at-fault driver fails to pay for the damage; reinstatement needs a $20 fee and proof the damages were settled.
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9. In a work zone a flagger signals you to stop, but the sign beside the road says the lane is open. What should you do?
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Answer C: Obey the flagger
A flagger controls the work zone in real time and the instruction outranks the signs and markings, which cannot reflect what is happening at that moment.
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10. Why should the washer reservoir hold proper washer fluid rather than plain water in winter?
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Answer D: Water freezes and it leaves you with no way at all to clean the glass
Washer fluid contains antifreeze, so it still works in the cold, whereas water freezes in the reservoir and the lines.
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11. Fog thickens until you can barely make out the vehicle ahead. What is the safest action?
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Answer A: Slow right down and, if needed, leave the road at a safe place
In heavy fog the only safe speed may be very low, and if it drops below what the road allows, the answer is to pull well clear of the traffic lanes.
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12. What should a driver expect a short distance beyond this sign?
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Answer C: Another road crossing the one being traveled
Traffic may enter or cross from either side at the intersection ahead, so the driver should ease off, cover the brake and check both approaches.
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13. You and an oncoming driver are both turning left at the same intersection. What is the usual rule?
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Answer D: Both turn in front of each other unless markings show otherwise
The normal practice is to pass driver side to driver side, turning in front of one another, unless pavement markings or signs direct a different path.
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14. You have driven at 70 mph for an hour and then exit onto a town street. What is the common risk?
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Answer B: Your sense of speed adapts, so 35 mph feels slow and you drive too fast
After a long stretch at high speed the brain adapts, so town speeds feel unnaturally slow; check the speedometer instead of trusting the feeling.
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15. An orange background with a black legend on a sign indicates
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Answer B: a temporary traffic control or work zone situation
Orange is reserved for temporary traffic control signing, so an orange sign means conditions have been altered for work or another temporary operation.
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16. Why do many crashes happen on routes the driver knows very well?
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Answer D: Familiar roads let attention slip into routine
When a route is automatic the mind wanders and hazards get missed, which is why a well known road deserves the same attention as a strange one.
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17. A tow truck with flashing amber lights is loading a car on the shoulder ahead. How should you treat it?
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Answer B: Give it the same room as an emergency vehicle
Tow operators, utility crews and highway workers face the same danger from passing traffic, so move over or slow down for their flashing amber lights too.
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18. A driver ahead brakes for no reason you can see, again and again. What should you do?
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Answer B: Increase your following distance and be ready for yet another stop
Unexplained braking tells you the driver is unsure or distracted, so the safe answer is more room, not less.
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19. Permanent signs must be retroreflective or lighted so that
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Answer A: they show the same shape and color at night as by day
Retroreflective sheeting throws headlight light back to the driver, so a sign keeps its daytime shape and color after dark.
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20. How does higher speed affect the outcome of a crash?
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Answer A: It leaves less time to react and greatly increases the force of impact
Speed shortens the time available to avoid a hazard and raises the energy released in an impact, so both the likelihood and the severity of a crash increase.
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21. 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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22. Which steering method gives the most control when you must turn the wheel a long way at low speed?
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Answer C: Hand over hand, feeding the wheel from one hand to the other
Hand over hand keeps both hands on the wheel through a large turn, so you never lose the ability to correct quickly.
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23. Why is parking next to a fire hydrant or in a marked fire lane prohibited?
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Answer D: It would delay firefighters who need immediate access to the hydrant or the building
Fire hydrants and fire lanes must remain clear at all times so emergency crews can connect hoses and reach a building without delay.
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24. You are joining a highway from a short ramp that has no acceleration lane. What should you do?
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Answer A: Stop or slow at the end of the ramp and wait for a safe gap
Without an acceleration lane there is no room to match speed, so you must yield at the end of the ramp and enter only when a gap allows it.
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25. What is the penalty for a third or later Missouri insurance suspension?
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Answer A: A one-year suspension and a $400 fee
A third or subsequent insurance suspension in Missouri means a one-year suspension, a $400 fee and a three-year insurance filing.