Missouri DOR Permit Practice Test 25
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age15 years
-
1. Why should you stay out of an intersection you cannot clear, even on a green light?
Show answer
Answer B: Because you would block cross traffic when their signal turns green
A vehicle stranded in the intersection blocks the cross street when its light turns green, which stalls the whole junction and traps emergency vehicles.
-
2. You are ready to pull out of a parallel parking space into the traffic lane. What should you do?
Show answer
Answer C: Signal, check the mirror and blind spot, and wait for a gap
A driver leaving a parking space must yield to traffic already in the lane, so signal, look for the gap and only then move out.
-
3. What is the correct technique for backing a vehicle straight?
Show answer
Answer B: Check behind the vehicle before getting in, then turn and look through the rear window while backing slowly
Mirrors and cameras leave gaps close to the vehicle, so walk behind it first, then turn in your seat for a direct view and keep the speed low enough to stop instantly.
-
4. You have just returned to your own lane after passing. Why should you not slow down straight away?
Show answer
Answer A: The vehicle you passed is close behind and needs room to stop
Returning and then braking leaves the driver you just overtook with almost no following distance, which is how a pass turns into a rear-end collision.
-
5. Traffic is heavy and crawling where a sign warns that your lane ends and two lanes must become one. What is the best practice?
Show answer
Answer C: Use the lane to the end, then take turns merging one by one
In stop-and-go traffic the zipper merge, using both lanes up to the merge point and then alternating, keeps the queue shorter and traffic moving; in free-flowing traffic move over as soon as it is safe.
-
6. A reduced speed limit posted with this sign and a plaque giving hours is in force
Show answer
Answer C: during the hours shown on the plaque, or while the beacon is flashing
A school speed limit applies during the periods stated on the plaque or while the attached beacon flashes, and the regular limit governs outside those periods.
-
7. A yellow pennant-shaped sign is posted on the left side of a two-lane road facing you. What is it telling you?
Show answer
Answer B: You are entering a no-passing zone and may not start a pass
The pennant is placed on the left so that it faces the driver who might pull out, and it marks the beginning of a no-passing zone.
-
8. About how far behind a tractor-trailer does the driver's rear blind spot reach?
Show answer
Answer C: Around 30 feet
The area behind a large truck is hidden for roughly 30 feet, so a driver tucked in there cannot be seen at all.
-
9. A large X with the letters R and R beside it is painted across your lane. What does it mean?
Show answer
Answer A: A railroad crossing lies a short distance ahead
The pavement marking repeats the advance warning for a grade crossing, and it is used on paved approaches where speeds are high or where gates are installed.
-
10. Why do young drivers carrying several friends face a higher crash risk?
Show answer
Answer D: Because young passengers are a strong source of distraction and pressure
Crash risk for new drivers rises with each extra young passenger, mainly through distraction and social pressure.
-
11. A small plate under a stop sign reads CROSS TRAFFIC DOES NOT STOP. What is it telling you?
Show answer
Answer D: Traffic on the cross street is not required to stop at all
The plate warns that the other road is uncontrolled, so you must wait for a gap instead of expecting anyone to take turns with you.
-
12. Why is a wet road at night harder to read than the same road in daylight?
Show answer
Answer A: The wet surface reflects light away and swallows the lane markings
A film of water sends your headlight beam onward instead of back to you, so lines, edges and people in dark clothing almost disappear.
-
13. Besides the traffic behind you, what else must you check before moving into the next lane?
Show answer
Answer D: That there is room ahead in the new lane for your normal following distance
Moving into a gap that is too short leaves you tailgating the vehicle ahead with a vehicle close behind you.
-
14. What should you do as you approach your exit from a roundabout?
Show answer
Answer A: Signal right and check the crosswalk for pedestrians before leaving
A right signal tells following drivers and waiting drivers that you are leaving, and pedestrians cross at the exit leg, so the crosswalk must be checked.
-
15. What are front fog lights for?
Show answer
Answer D: Adding a low, wide beam close to the car when visibility is poor
Fog lights throw a low, wide beam under the fog, which is why they are mounted low and are used only in poor visibility.
-
16. May you stop in a marked bicycle lane to let a passenger out?
Show answer
Answer B: No, stopping there forces riders into the traffic lane
A vehicle stopped in a bike lane pushes riders out into moving traffic, which is exactly what the lane exists to prevent.
-
17. On a long uphill grade a second lane opens on the right and a sign directs slower traffic into it. You are towing a trailer and holding up a line of vehicles. What should you do?
Show answer
Answer A: Move into the right-hand lane and let the faster traffic use the left lane
A climbing lane exists so that slow vehicles can be passed safely, and the slower vehicle is the one that belongs in it.
-
18. What is true about an airbag once it has inflated in a crash?
Show answer
Answer B: It must be replaced by a technician before the car is driven any further
An airbag is a single use device, and the module and often the belts must be replaced before the vehicle protects anyone again.
-
19. What makes a left turn protected rather than permissive?
Show answer
Answer B: Oncoming traffic is held by a red signal while you have a green arrow
A protected turn is one where the conflicting movements are stopped by their own signal, which is what the green arrow indicates.
-
20. What does electronic stability control do that ordinary brakes cannot?
Show answer
Answer C: It brakes single wheels to bring the vehicle back on your intended path
The system compares where you have steered with where the vehicle is actually going, then brakes individual wheels to pull it back into line.
-
21. For an alert driver, about how long is the reaction time once a hazard has been recognized?
Show answer
Answer A: About three quarters of a second
Reaction alone takes roughly three quarters of a second for an alert driver, and perception takes about as long again, so a second and a half of travel is added before the brakes bite.
-
22. About how much alcohol can the body eliminate per hour?
Show answer
Answer A: About one standard drink
The liver removes alcohol at a nearly fixed rate of roughly one standard drink per hour. Drinking faster than that raises the blood alcohol level, and nothing speeds the process.
-
23. Your left-turn lane shows a flashing yellow arrow. What does that indication allow?
Show answer
Answer B: A left turn after yielding to oncoming traffic and to pedestrians
A flashing yellow arrow marks a permissive left turn: the movement is allowed, but oncoming vehicles and pedestrians keep the right-of-way.
-
24. Your brake pedal sinks to the floor and the vehicle does not slow down. What is a reasonable sequence of actions?
Show answer
Answer C: Pump the pedal, shift to a lower gear and apply the parking brake gradually while steering to a safe spot
Pumping can rebuild pressure in a partly failed system, a lower gear adds engine braking, and easing on the parking brake slows the vehicle without locking the wheels.
-
25. You hear a bang and one of the front tires deflates while you are on the highway. What happens to the vehicle?
Show answer
Answer D: It pulls strongly toward the side that failed
The collapsed tire drags heavily on that corner, so the vehicle veers toward it. Hold the wheel firmly, keep your line and let the speed fall before leaving the road.