District of Columbia DC DMV Permit Practice Test 21
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age16 years
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1. Why are drivers required to turn the front wheels when parking on a grade?
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Answer A: So that a vehicle that starts to roll leaves the traffic lanes instead of entering them
The wheel position is a last line of defense if the parking brake or transmission fails, directing the vehicle into the curb or off the roadway.
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2. In a vehicle with automatic transmission, which foot should operate the brake and accelerator?
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Answer D: The right foot for both pedals
Using only the right foot prevents pressing both pedals at once and keeps the response the same in every vehicle you drive. The left foot rests on the floor or the footrest.
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3. How does alcohol typically affect a driver's vision?
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Answer D: It blurs vision, weakens night vision and narrows attention to the sides
Alcohol slows the eye muscles and the brain's processing of what is seen, degrading focus, night vision, depth perception and awareness of movement at the edges of the field of view.
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4. You are very angry after an argument and about to drive. What should you know?
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Answer A: Strong emotions can impair judgment and attention much like alcohol
Anger, grief and stress pull attention inward and encourage risk taking. Give yourself time to settle down before getting behind the wheel.
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5. A train has just passed a crossing that carries more than one set of tracks. What should you do?
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Answer B: Wait until the warning devices stop and you can see clearly along every track
A passing train can hide a second one coming on another track, so wait for the signals to clear and check each track before moving.
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6. You and a driver coming from the opposite direction reach a four-way stop at the same time and you are both going straight ahead. What happens next?
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Answer D: Both of you may move off together, because your paths do not cross each other
Opposing vehicles that are both going straight do not cross paths, so they can move off together once the intersection is clear.
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7. You have passed a large truck and want to move back into its lane. What should you see first?
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Answer B: Both of its headlights in your rear-view mirror
Seeing both headlights in your mirror means you are far enough ahead to be out of the truck's front no-zone before you move over.
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8. At a stop sign with a painted stop line and a crosswalk, where must you stop?
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Answer D: At the stop line, before it and before the crosswalk
You stop at the stop line first, and only if there is no stop line do you stop before the crosswalk, and only if there is neither do you stop before entering the intersection.
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9. 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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10. You have to leave a trailer parked on a slope. What extra step protects it?
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Answer D: Chock the trailer wheels as well as setting the brake
Chocks physically block the wheels, which is the only thing that still holds if a brake or a coupling lets go.
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11. What is the sensible way to handle a meal on a long drive?
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Answer D: Eat before you leave or stop to eat
Eating takes hands, eyes and attention, and the only version with no cost to your driving is the one that happens while the car is parked.
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12. What habit prevents the hood from flying up while you are driving?
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Answer D: Press the hood down at the front and check that the latch has caught
Most hoods fly up because they were left on the safety catch, so check that the main latch is fully closed after any work under the hood.
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13. Which of these is part of preparing a vehicle for winter driving?
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Answer A: Fitting good tires and using washer fluid that will not freeze
Winter readiness means tread, battery, wipers, antifreeze and washer fluid rated for the cold, plus a reasonable amount of fuel in the tank.
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14. After turning right you see a sign showing that your lane ends a short way ahead. What should you do?
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Answer B: Signal and merge into the next lane while there is still room
Merge early and smoothly while a gap is still available, rather than running out of pavement or forcing your way in at the last moment.
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15. You are turning right from a one-way street onto a two-way street. Where should the turn end?
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Answer A: In the lane nearest the right curb of the street you are entering
A right turn starts and finishes as close to the right as practical, so you leave the one-way street from the right lane and arrive in the lane nearest the right curb.
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16. You are approaching a narrow bridge where the road has one lane in each direction and no shoulder. What should you do about passing?
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Answer B: Do not pass on or near the bridge
A narrow bridge gives neither vehicle anywhere to go, so passing is prohibited there in the same way as on a hill or in a tunnel.
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17. Your steering suddenly feels light and unresponsive as you drive through standing water. What should you do first?
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Answer A: Ease off the accelerator and keep the steering wheel pointed straight
Those symptoms mean the tires are riding on a film of water, and gently lifting off the accelerator lets them settle back onto the pavement. Hard braking or sudden steering while hydroplaning can start a skid.
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18. At a freeway exit, the paved triangle between the ramp and the through lanes is filled with diagonal white lines. What do they mean?
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Answer A: Stay out of that area, because it is not meant to be driven on
Chevron and diagonal markings fill paved areas that traffic is not intended to use, so drivers should keep out of them.
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19. Why is standing water across a road dangerous even when it looks shallow?
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Answer B: It can hide a washed out roadbed, a deep hole or a missing cover
You cannot see the surface under the water, and floods commonly wash the roadbed away or lift covers off drains.
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20. What does DC law say about headphones or earbuds while driving?
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Answer D: Headphones covering both ears or earbuds in both ears are prohibited unless they assist a hearing-impaired driver
DC prohibits headphones covering both ears and earbuds in both ears, with an exception for hearing-impaired drivers.
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21. How long must a DC applicant wait before retaking a failed road skills test?
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Answer D: 72 hours
DC DMV requires a 72-hour wait before the road skills test can be retaken.
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22. A signal on an entrance ramp changes from red to green and lets one vehicle at a time onto the highway. What should you do?
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Answer A: Stop on the red and go on the green, one vehicle for each green
A ramp meter spaces vehicles out so they join the highway one at a time instead of arriving as a group, and it is a traffic signal like any other.
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23. A sign with a brown background and a white legend guides road users to
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Answer B: parks, campgrounds and other recreational or cultural sites
Brown is reserved for recreational and cultural interest area signing, such as parks, historic sites and scenic areas.
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24. You have fitted the small temporary spare tire after a flat. What should you keep in mind?
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Answer C: It is meant for low speed and short distances until the regular tire is repaired
Compact spares have limited grip, handling and durability. Follow the speed and distance limits printed on the tire and get the regular tire fixed soon.
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25. Why does a heavier vehicle need more room to stop than a light one from the same speed?
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Answer B: Because there is more mass in motion for the tires to slow down
More mass means more energy at the same speed, and the brakes and tires need more distance to get rid of it.