Iowa DOT Permit Practice Test 2026：第4套练习测试

Iowa DOT Permit Practice Test 练习测试第4套（共8套）：再练25道题，附答案和解释。

驾驶
艾奥瓦州
205道题
核对于2026年10月10日

第1题，共25题
Where are a large truck's blind spots, or No-Zones?
- In front, behind and along both sides
- Trucks have no blind spots because the driver sits up high
- Only on the left side
- Only directly behind it
显示答案
答案: A. In front, behind and along both sides
Large trucks and buses have big blind spots on all four sides. Do not stay in them.
第2题，共25题
What does this sign mean?
- A YIELD sign is ahead; be ready to slow down or stop
- No passing
- A railroad crossing is ahead
- Merge into the next lane now
显示答案
答案: A. A YIELD sign is ahead; be ready to slow down or stop
Slow down so you can yield to traffic at the YIELD sign ahead.
第3题，共25题
What does this sign mean?
- Hospital staff parking
- A wheelchair crossing is ahead
- Loading zone
- Parking only for vehicles with a valid disability placard or license plate
显示答案
答案: D. Parking only for vehicles with a valid disability placard or license plate
Do not park in these spaces unless your vehicle displays a valid disability placard or plate. You can be fined.
第4题，共25题
What should you do when you see this sign?
- Slow down and watch for deer, especially at dawn and dusk
- Turn off your headlights so deer are not blinded
- Honk your horn the whole time
- Swerve sharply if you see a deer
显示答案
答案: A. Slow down and watch for deer, especially at dawn and dusk
Deer are most active at dawn and dusk. If one appears, brake firmly and stay in your lane rather than swerving.
第5题，共25题
Your car goes into deep water and starts to sink. What should you do?
- Stay buckled and wait for help
- Unbuckle and escape through a window
- Open a door right away
- Turn the engine off and on again
显示答案
答案: B. Unbuckle and escape through a window
Get out through a window. Opening a door can let water rush in and roll the car over.
第6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7题，共25题
A driver is tailgating you. What is the safest thing to do?
- Brake suddenly to warn the driver
- Stop on the shoulder right away
- Keep a steady speed, leave extra space ahead, and let the driver pass
- Speed up to get away
显示答案
答案: C. Keep a steady speed, leave extra space ahead, and let the driver pass
Do not react with sudden braking. Keep extra space in front of you so you can stop gently, and let the tailgater pass when possible.
第8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9题，共25题
You see this emblem on the back of a vehicle. What does it mean?
- The vehicle moves much slower than normal traffic, like farm equipment
- The vehicle carries hazardous materials
- It is carrying a wide load
- It is an emergency vehicle
显示答案
答案: A. The vehicle moves much slower than normal traffic, like farm equipment
You can come up on these vehicles very quickly. Slow down early and pass only when it is safe and legal.
第10题，共25题
In most states, how far before a turn should you start signaling?
- At least 10 feet
- Only as you begin to turn
- At least half a mile
- At least 100 feet
显示答案
答案: D. At least 100 feet
Most state laws require you to signal at least 100 feet before you turn. Check your state handbook in case a longer distance applies.
第11题，共25题
In which direction does traffic travel in a US roundabout?
- Toward the center island
- Counterclockwise
- Clockwise
- Either direction
显示答案
答案: B. Counterclockwise
In the United States, traffic in a roundabout moves counterclockwise, to the right of the center island.
第12题，共25题
Your light turns green, but a pedestrian is still crossing in front of you. What should you do?
- Honk so the pedestrian hurries
- Wait until the pedestrian has finished crossing
- Drive slowly around the pedestrian
- Go, because you have a green light
显示答案
答案: B. Wait until the pedestrian has finished crossing
A green light lets you go only after you yield to pedestrians in the crosswalk and vehicles already in the intersection.
第13题，共25题
Which headlights should you use in fog?
- Low beams
- High beams
- No lights, to reduce glare
- Parking lights only
显示答案
答案: A. Low beams
High beams reflect off fog and cause glare. Low beams help you see and help others see you.
第14题，共25题
When is it safe to pull back in front of a large truck you have passed?
- As soon as you pass the cab
- When the truck driver honks
- When you can see the whole truck in your rearview mirror
- Right after your rear bumper passes its front bumper
显示答案
答案: C. When you can see the whole truck in your rearview mirror
Cutting in too soon puts you in the truck's front blind spot, where it cannot stop in time. Wait until you see it in your mirror.
第15题，共25题
What does this sign mean?
- The road ahead becomes a divided highway; keep right
- The divided highway ends
- A narrow bridge is ahead
- A crossroad is ahead
显示答案
答案: A. The road ahead becomes a divided highway; keep right
A median or barrier will separate the two directions of traffic. Keep to the right of it.
第16题，共25题
What information should drivers exchange after a crash?
- Nothing, because the police handle it
- Only phone numbers
- Names, addresses, driver license numbers, vehicle registration and insurance
- Only the names of their insurance companies
显示答案
答案: C. Names, addresses, driver license numbers, vehicle registration and insurance
Give and get names, addresses, license numbers, registration and insurance details from the other drivers involved.
第17题，共25题
Your car stalls on railroad tracks and a train is coming. What should you do?
- Try to push the car off the tracks
- Run along the tracks away from the train
- Stay in the car and keep trying to start it
- Get everyone out and walk away from the tracks at an angle toward the train
显示答案
答案: D. Get everyone out and walk away from the tracks at an angle toward the train
Get out right away. Moving toward the train at an angle keeps you away from flying debris, which spreads in the direction the train is going.
第18题，共25题
You are involved in a minor crash. What must you do?
- Wait in your car until the other driver leaves
- Stop at the scene
- Drive home and call your insurance company
- Leave if the damage looks small
显示答案
答案: B. Stop at the scene
If you are in a crash, you must stop, no matter how small the damage is.
第19题，共25题
The gates at a railroad crossing are coming down. What should you do?
- Speed up and go under the gates
- Stop on the tracks until the gates rise
- Stop and wait until the gates are up and the lights stop flashing
- Drive around the gates if you cannot see a train
显示答案
答案: C. Stop and wait until the gates are up and the lights stop flashing
Never drive around or under lowered or lowering gates. Wait until they are fully up.
第20题，共25题
What does implied consent mean?
- Police may search your home at any time
- You may refuse a chemical test with no penalty
- By driving, you have agreed to a chemical test for alcohol or drugs if lawfully asked by police
- Your passengers must also be tested
显示答案
答案: C. By driving, you have agreed to a chemical test for alcohol or drugs if lawfully asked by police
Under implied consent laws, getting a license and driving means you agree to be tested when an officer lawfully asks.
第21题，共25题
A car in the lane next to you has stopped at a crosswalk. What should you do?
- Honk and pass
- Change lanes and speed up
- Stop as well, because a pedestrian may be crossing
- Pass it carefully
显示答案
答案: C. Stop as well, because a pedestrian may be crossing
Never pass a vehicle that has stopped at a crosswalk. A pedestrian you cannot see may be crossing in front of it.
第22题，共25题
What does this sign mean?
- The signal ahead is broken
- There is a pedestrian signal only
- There is a traffic signal ahead
- A railroad signal is ahead
显示答案
答案: C. There is a traffic signal ahead
Slow down and be ready to stop for a red light. This sign is used where the signal is hard to see.
第23题，共25题
What does this sign mean?
- Traffic from another road will join your lane; be ready to let it in
- Two lanes become three
- Your lane ends and you must exit
- A divided highway begins
显示答案
答案: A. Traffic from another road will join your lane; be ready to let it in
Traffic is merging from the side shown. Adjust your speed, or change lanes if it is safe, so vehicles can merge smoothly.
第24题，共25题
When may you pass another vehicle on the right?
- When the vehicle ahead is turning left and there is room to pass safely
- When you can use the shoulder
- Whenever the vehicle ahead is slow
- Only on a two-lane road
显示答案
答案: A. When the vehicle ahead is turning left and there is room to pass safely
You may pass on the right only when it is safe, such as when the car ahead is turning left or on a road with two or more lanes your way. Never use the shoulder.
第25题，共25题
An angry driver makes rude gestures and shouts at you. What should you do?
- Stay calm, avoid eye contact, and do not respond
- Speed up to get in front of the driver
- Brake suddenly to teach the driver a lesson
- Gesture back
显示答案
答案: A. Stay calm, avoid eye contact, and do not respond
Do not challenge an aggressive driver. Stay calm, ignore the gestures, and give the driver space.

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