South Carolina DMV Permit Practice Test 2026：第7套练习测试

South Carolina DMV Permit Practice Test 练习测试第7套（共8套）：再练25道题，附答案和解释。

驾驶
南卡罗来纳州
205道题
核对于2026年10月10日

第1题，共25题
Car A is waiting to enter this roundabout. Car B is already in the roundabout. Which car has the right-of-way?
- Whichever car is larger
- Whichever car honks first
- Car B
- Car A
显示答案
答案: C. Car B
Yield to all traffic already in the roundabout, then enter when there is a safe gap.
第2题，共25题
You feel sleepy while driving. What is the safest choice?
- Open the window and turn up the radio
- Chew gum and keep driving
- Drive faster to get home sooner
- Pull over in a safe place and rest or take a short nap
显示答案
答案: D. Pull over in a safe place and rest or take a short nap
Tricks like a cold window or loud music do not work. Stop and rest; only sleep cures drowsiness.
第3题，共25题
In almost every state, an adult driver age 21 or older is breaking the law if their blood alcohol concentration (BAC) is at or above what level?
- 0.12%
- 0.15%
- 0.20%
- 0.08%
显示答案
答案: D. 0.08%
It is illegal in every state except Utah to drive with a BAC of 0.08% or higher. Utah's limit is 0.05%, and stricter limits apply to younger and commercial drivers.
第4题，共25题
A flagger in a work zone holds up a STOP paddle. What must you do?
- Stop and wait until the flagger signals you to go
- Stop only if workers are in your lane
- Honk and keep going
- Slow down and drive around the flagger
显示答案
答案: A. Stop and wait until the flagger signals you to go
Work zone flaggers are allowed to direct traffic. Their signals must be obeyed like a traffic officer's.
第5题，共25题
What does this sign mean?
- Trucks must use this route
- One-way street to the right
- The road ahead turns right
- Follow this route because the usual road is closed
显示答案
答案: D. Follow this route because the usual road is closed
A detour takes you around a closed road. Follow the detour signs until you are back on your route.
第6题，共25题
At a T-intersection with no signs or signals, who has the right-of-way?
- The vehicle turning left
- Traffic on the through road
- The largest vehicle
- Traffic on the road that ends
显示答案
答案: B. Traffic on the through road
Drivers on the road that continues straight through have the right-of-way. Drivers on the road that ends must yield.
第7题，共25题
Which numbered marking means that drivers from both directions may not pass?
- Marking 5
- Marking 3
- Marking 2
- Marking 4
显示答案
答案: B. Marking 3
A double solid yellow line (marking 3) means no passing in either direction.
第8题，共25题
Besides police cars, which stopped vehicle with flashing lights should you also slow down and move over for?
- A tow truck helping a driver on the shoulder
- A car parked in a driveway
- A delivery van parked at the curb
- A bus at a bus stop with no lights flashing
显示答案
答案: A. A tow truck helping a driver on the shoulder
In many states, Move Over rules also cover tow trucks and highway work vehicles with flashing lights. Giving them space protects the people working beside the road.
第9题，共25题
A front tire blows out while you are driving on the highway. What should you do?
- Hold the wheel tightly and slowly ease off the gas
- Brake hard right away
- Speed up to keep control
- Steer sharply onto the shoulder
显示答案
答案: A. Hold the wheel tightly and slowly ease off the gas
Grip the wheel firmly, keep the car straight, and let it slow down before you brake gently and pull off.
第10题，共25题
What does this sign mean?
- A hospital zone begins
- A school is near; slow down and watch for children
- A playground is ahead
- An adults-only crosswalk is ahead
显示答案
答案: B. A school is near; slow down and watch for children
The five-sided school sign warns that you are near a school. Slow down, watch for children and obey any school speed limit.
第11题，共25题
You see this sign facing you on a ramp. What should you do?
- Keep driving in the left lane with your hazard lights on
- You are going the wrong way: pull over safely, turn around and leave the way you came
- Speed up to get off the ramp quickly
- Keep going and take the next exit
显示答案
答案: B. You are going the wrong way: pull over safely, turn around and leave the way you came
WRONG WAY signs face drivers who are going against traffic. Stop safely, turn around and drive in the correct direction.
第12题，共25题
What is hydroplaning?
- When a tire slowly loses air
- When water gets into your engine
- When your tires ride on a layer of water and lose contact with the road
- When your brakes overheat on a long hill
显示答案
答案: C. When your tires ride on a layer of water and lose contact with the road
At higher speeds on wet roads, tires can ride up on water. You then lose steering and braking control.
第13题，共25题
Which signs use this round shape?
- Hospital signs
- Railroad crossing advance warning signs
- Speed limit signs
- School zone signs
显示答案
答案: B. Railroad crossing advance warning signs
In the United States the circle shape is used for the railroad advance warning sign.
第14题，共25题
Which road users are especially hard to see at night?
- Trucks with clearance lights
- Police cars with lights flashing
- Buses with interior lights on
- Pedestrians, bicyclists and motorcyclists
显示答案
答案: D. Pedestrians, bicyclists and motorcyclists
People walking, cycling or riding motorcycles are much harder to see in the dark. Slow down and look carefully.
第15题，共25题
What does keeping a space cushion around your car, as shown, give you?
- The right-of-way over other drivers
- A shorter braking distance
- Time and room to react if something goes wrong
- Better fuel economy
显示答案
答案: C. Time and room to react if something goes wrong
Space around your vehicle gives you time to see problems and room to steer or stop.
第16题，共25题
A truck signaling a right turn swings left first. What should you do?
- Pass it on the right
- Pull up beside the cab
- Honk and pass it quickly
- Stay back and do not try to squeeze between the truck and the curb
显示答案
答案: D. Stay back and do not try to squeeze between the truck and the curb
Trucks swing wide to make right turns. Never try to get between a turning truck and the curb.
第17题，共25题
In a state where marijuana is legal, may you drive after using it?
- Yes, if you have a medical card
- Yes, but only during the day
- No, driving while impaired by any drug is illegal
- Yes, as long as you feel fine
显示答案
答案: C. No, driving while impaired by any drug is illegal
Impairment from marijuana is treated like impairment from any other drug. Do not use it before driving.
第18题，共25题
You come to a traffic light that is completely dark because of a power outage. What should you do?
- Honk and keep going
- Treat the intersection like an all-way stop
- Yield only to cars on your left
- Drive through if no cars are close
显示答案
答案: B. Treat the intersection like an all-way stop
When a signal is not working, stop as you would at a stop sign, then follow the right-of-way rules.
第19题，共25题
Your gas pedal sticks while you are driving. What should you do?
- Reach down with your hand while driving fast
- Pump the gas pedal hard
- Shift to neutral, brake, and pull off the road when it is safe
- Turn the key off right away
显示答案
答案: C. Shift to neutral, brake, and pull off the road when it is safe
Shifting to neutral cuts power to the wheels. Turning off the ignition could lock the steering.
第20题，共25题
Marking 4 is a solid yellow line next to a broken yellow line. When may you pass?
- Only when the broken line is on your side
- Whenever the road ahead looks clear
- Never, from either side
- Only when the solid line is on your side
显示答案
答案: A. Only when the broken line is on your side
With a solid and a broken line together, drivers on the broken-line side may pass when safe. Drivers on the solid side may not.
第21题，共25题
In freezing weather, which part of the road often ices over first?
- Long straight roads in the sun
- Roads in the middle of town
- Bridges and overpasses
- Uphill sections facing the sun
显示答案
答案: C. Bridges and overpasses
Cold air flows above and below bridges and overpasses, so they freeze before other parts of the road.
第22题，共25题
Signs with this fluorescent yellow-green color are used for:
- Schools, pedestrians and bicycles
- Gas, food and lodging
- Road work zones
- Railroad crossings
显示答案
答案: A. Schools, pedestrians and bicycles
Fluorescent yellow-green is used for school, pedestrian and bicycle signs because it is easy to see.
第23题，共25题
Can cold or allergy medicine you buy without a prescription affect your driving?
- No, only prescription drugs affect driving
- Only if you take it with food
- No, these medicines are always safe
- Yes, some can make you drowsy, so read the label
显示答案
答案: D. Yes, some can make you drowsy, so read the label
Many over-the-counter medicines cause drowsiness. Read the warning label and ask a pharmacist if you are unsure.
第24题，共25题
At night, a car is coming toward you, as shown. When should you switch from high beams to low beams?
- Only if the other driver flashes the lights
- When it is within 50 feet
- When it is within 500 feet
- When it is within 2 miles
显示答案
答案: C. When it is within 500 feet
State laws generally require low beams within 500 feet of an oncoming vehicle, so you do not blind the other driver.
第25题，共25题
An ambulance (1) with flashing lights and a siren is coming. What should drivers like Car 2 and Car 3 do?
- Pull over to the right edge of the road and stop until it passes
- Stop right where they are in their lanes
- Speed up to stay ahead of it
- Move toward the center line
显示答案
答案: A. Pull over to the right edge of the road and stop until it passes
Drivers going either way on a two-way road must pull to the right edge and stop for an emergency vehicle using lights and a siren.

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