Missouri DOR Permit Practice Test 40
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age15 years
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1. You have just had bad news and you feel very upset. What should you do?
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Answer B: Wait until you have calmed down, or else let somebody else drive
Strong emotion takes attention away from the road as surely as alcohol or fatigue, so it is a reason not to drive yet.
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2. A steady green arrow pointing left is displayed for your turning lane. What does it tell you?
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Answer D: The turn is protected because conflicting traffic is being held
A steady green arrow gives a protected movement in the direction shown, although you still yield to pedestrians and to any vehicle already inside the intersection.
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3. A hands free phone conversation is which kind of distraction?
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Answer C: Cognitive, because your mind leaves the road
Hands free equipment removes the manual and visual parts of a call but not the mental load, and it is the mental load that makes a driver miss hazards.
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4. What is the recommended minimum distance between the driver's breastbone and the center of the steering wheel air bag cover?
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Answer C: About 10 inches
An air bag inflates extremely fast, and keeping that much space lets it deploy fully before it reaches the driver, which is why the seat should be moved back as far as still allows comfortable control of the pedals.
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5. Some toll facilities use signs and markings with a purple background or a purple stripe. What do they identify?
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Answer D: Lanes reserved for vehicles with an electronic toll account
Purple is assigned to lanes and ramps restricted to vehicles with a registered electronic toll collection account, so drivers without one must stay out.
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6. Which use of a phone is still allowed while a Missouri vehicle is moving?
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Answer C: A hands-free call started with a single touch or swipe
Missouri allows voice-operated and hands-free calling, voice-to-text, navigation and audio, provided the driver does not hold or support the device.
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7. The only person offering you a ride home has been drinking. What should you do?
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Answer B: Do not get in; find another way home
A passenger in an impaired driver's vehicle shares all of the risk and can do nothing about it from the seat, so the only safe answer is another ride.
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8. You are parked legally, but a police officer tells you to move the vehicle. What should you do?
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Answer B: Move it as directed, because an officer overrides the signs
Directions from a police officer or a firefighter take precedence over signs and markings, whether they are directing traffic or clearing a street.
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9. The blue signs mounted before a freeway interchange that carry the logos of individual businesses are
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Answer C: specific service signs, which show the brands available at that exit
Specific service signs, often called logo signs, list eligible businesses for categories such as gas, food, lodging, camping, attractions and 24-hour pharmacies at the upcoming interchange.
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10. Which Missouri drivers are required to hold a Class E license?
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Answer C: Drivers paid to carry 14 or fewer passengers or to haul property
The Class E for-hire license covers driving for pay, such as carrying 14 or fewer passengers or delivering property in a vehicle rated at 26,000 pounds or less.
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11. How long can cannabis affect a driver?
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Answer A: For hours after the strongest effects have passed
Slowed reactions, poor tracking and weak judgment of distance can last for hours, well beyond the point where the user believes the effects are over.
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12. You are passing a tractor-trailer on a wet freeway and its wheels throw heavy spray. What is the best technique?
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Answer B: Increase your wipers and pass steadily without hesitating
Spray blinds you for as long as you stay beside the truck, so prepare the wipers first and then spend as little time in the spray as possible.
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13. You are inside a tunnel with no shoulder when an ambulance comes up behind you with lights and siren. What should you do?
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Answer D: Keep going at a safe speed and pull over once you are clear of the tunnel
Stopping in a tunnel or on a narrow bridge blocks the only lane, so continue at a safe speed to the first place where you can pull clear.
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14. Your light turns green and a driver on the cross street enters against a red. What should you do?
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Answer D: Hold back and let that vehicle go through
Giving up a right of way you are entitled to is the only way to avoid a crash with a driver who has already failed to yield.
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15. Roughly how far does a vehicle travel at 55 mph during the few seconds a driver spends reading a text message?
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Answer D: About the length of a football field
Sending or reading a message takes the eyes off the road for about five seconds, which at 55 mph covers roughly the length of a football field with nobody watching the road.
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16. Traffic is entering the freeway from a ramp ahead of you and you are in the right lane. What should you do?
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Answer C: Move to another lane if it is safe, or adjust your speed to make room
Merging drivers may have little room to adjust. Helping them in by changing lanes or easing your speed prevents conflicts even though they must legally yield to you.
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17. What is the correct relationship between air bags and seat belts?
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Answer B: Air bags are designed to work together with seat belts, not instead of them
An air bag is a supplemental restraint that cushions one impact, while the belt keeps you in position so the bag can work and protects you in rollovers and secondary impacts.
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18. What administrative action follows a first Missouri arrest for driving with a BAC of .08 percent or more?
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Answer B: A 90-day suspension, with a restricted privilege possible
A first alcohol offense brings a 90-day suspension in Missouri, and the driver may qualify for a 90-day or 60-day restricted driving privilege.
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19. Your vehicle has a blind spot warning light in the door mirror. What should that mean for your habits?
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Answer B: You still check the blind spot yourself, because the system can miss a rider
Blind spot systems are an aid, not a substitute, and a motorcycle or a bicycle can be missed or arrive faster than the sensor expects.
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20. You have finished parallel parking at the curb. How should the vehicle sit?
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Answer A: Close to the curb, so that it does not stick out into the traffic lane
A parked vehicle must sit close enough to the curb that it does not intrude into the path of passing traffic; the exact maximum distance is set by each state.
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21. Why are sign shapes and colors standardized across the whole country?
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Answer D: So a driver knows the kind of message before reading it
Uniform shapes and colors let a driver classify a sign as regulatory, warning or guide from a distance, before the legend can be read.
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22. How much more energy must your brakes absorb if you double your speed?
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Answer D: About four times as much, since energy rises with the square of speed
Kinetic energy grows with the square of speed, so twice the speed means about four times the energy and a far longer braking distance.
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23. A sign at the intersection prohibits U-turns, but the opening looks wide and clear. What may you do?
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Answer B: Obey the sign and turn around somewhere else
A prohibition applies whatever the traffic looks like at that moment, usually because of sight distance or conflicts you cannot see from the lane.
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24. You have fitted small convex blind spot mirrors to the door mirrors. What is true of them?
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Answer A: They help a good deal, but you should still look over your shoulder as well
Add-on mirrors reduce but do not remove the blind spot, and they make vehicles look smaller and further away.
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25. Alcohol is classified as which kind of drug?
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Answer B: A depressant that slows the central nervous system
As a depressant, alcohol slows the brain and nervous system, which lengthens reaction time and dulls the coordination that driving depends on.