Portugal Driving Theory Test (Category B) 2026：第4套练习测试

Portugal Driving Theory Test (Category B) 练习测试第4套（共8套）：再练25道题，附答案和解释。

驾驶
葡萄牙
250道题
核对于2026年10月11日

第1题，共25题
You are driving at night with main beam on and a car comes towards you. What should you do?
- Switch to dipped beam in good time
- Switch off all lights briefly
- Keep main beam on until the car passes
- Flash your lights repeatedly
显示答案
答案: A. Switch to dipped beam in good time
Dip your headlights in time so you do not dazzle oncoming drivers.
第2题，共25题
What does this sign mean?
- No entry for vehicles in this direction
- No stopping
- Road closed to pedestrians
- End of all restrictions
显示答案
答案: A. No entry for vehicles in this direction
The red disc with a white bar means you must not drive into the road from this side. It is often at the exit end of a one-way road.
第3题，共25题
Why can a train not stop to avoid a car on a level crossing?
- Train drivers are not allowed to brake
- Its high speed and weight mean it needs a very long distance to stop
- Trains have no brakes
- Trains always have a green light
显示答案
答案: B. Its high speed and weight mean it needs a very long distance to stop
Trains are unable to stop in time when a road user crosses as they approach.
第4题，共25题
Why is even a small amount of alcohol risky for drivers?
- It makes people think they can still drive safely when they cannot
- It makes people drive too slowly
- It improves concentration for a short time
- It only affects night vision
显示答案
答案: A. It makes people think they can still drive safely when they cannot
Alcohol weakens self-control: even a little makes people more likely to think they are fine to drive.
第5题，共25题
Red lights are flashing at a level crossing. What must you do?
- Stop and wait
- Cross quickly before the train comes
- Sound your horn and cross
- Slow down and cross if you see no train
显示答案
答案: A. Stop and wait
Flashing red lights at a level crossing mean a train is coming. You must stop.
第6题，共25题
You are driving on a road marked with this sign. A car waits at a side road on your right. Who goes first at the junction?
- The bigger vehicle
- Whoever arrived first
- The car on the right, because traffic from the right always goes first
- You do, because you are on the priority road
显示答案
答案: D. You do, because you are on the priority road
On a priority road you keep priority at junctions. Priority to the right does not apply against you here.
第7题，共25题
About how many pedestrians and cyclists survive being hit by a car at about 30 km/h, compared with about 50 km/h?
- Nearly everyone at both speeds
- About the same at both speeds
- About 90% at 30 km/h, but only about 20% at 50 km/h
- About 50% at 30 km/h and 40% at 50 km/h
显示答案
答案: C. About 90% at 30 km/h, but only about 20% at 50 km/h
Small speed differences make a huge difference to survival. This is why many towns use 30 km/h limits.
第8题，共25题
Traffic jams on a motorway with two lanes in your direction, in a country that requires an emergency corridor. You are in the left lane. Where do you move?
- Onto the hard shoulder
- To the right
- As far to the left as possible
- Stay in the middle of your lane
显示答案
答案: C. As far to the left as possible
Vehicles in the far-left lane move left; all other lanes move right. This opens a corridor between them.
第9题，共25题
Why should you leave a bigger gap to the vehicle in front when the road is wet?
- Wet roads make cars faster
- Your tyres have less grip, so you need more distance to stop
- Spray from your car could damage the car in front
- The law requires exactly double in all countries
显示答案
答案: B. Your tyres have less grip, so you need more distance to stop
Rain reduces tyre grip and makes braking harder, so stopping distances become longer.
第10题，共25题
What does this sign mean?
- Car park ahead
- Overtaking is never allowed again on this road
- No overtaking for the next 2 km
- The no-overtaking zone ends here
显示答案
答案: D. The no-overtaking zone ends here
White end signs with black stripes cancel an earlier ban. You may overtake again when it is safe and legal.
第11题，共25题
What effect does low tyre pressure have?
- It increases fuel use and can affect handling
- It makes braking shorter
- It reduces fuel use
- It has no effect
显示答案
答案: A. It increases fuel use and can affect handling
Under-inflated tyres have more rolling resistance, so the engine must work harder. Check pressure regularly.
第12题，共25题
A bus has stopped at a bus stop on your side of the road. What should you watch for?
- Passengers stepping out from in front of or behind the bus
- The bus reversing
- Nothing; buses always wait for traffic
- Cyclists using the bus stop
显示答案
答案: A. Passengers stepping out from in front of or behind the bus
People getting off a bus may cross the road suddenly. Slow down and be ready to stop.
第13题，共25题
How must young children travel in a car in the EU?
- With an adult belt from birth
- Loose on the back seat if the journey is short
- On an adult's lap
- In an approved child restraint suited to their size and weight
显示答案
答案: D. In an approved child restraint suited to their size and weight
Children must use a child restraint that suits their size and weight. Check each country's exact height and age rules.
第14题，共25题
An injured motorcyclist is awake, talking and breathing normally. What should you NOT do?
- Protect them from cold
- Call 112
- Remove their helmet
- Talk to them calmly
显示答案
答案: C. Remove their helmet
If the rider is awake and breathing, leave the helmet on, because removing it can make a neck injury worse. If the rider is unconscious and you need to open the airway or start CPR, the helmet must be removed carefully, ideally by two people, as first aid courses teach.
第15题，共25题
What does this sign mean?
- Police station
- Parking place
- Pedestrian zone
- Petrol station
显示答案
答案: B. Parking place
The white P on blue shows where you may park. Extra plates may limit the time or the type of vehicle.
第16题，共25题
What does this sign mean?
- You must give way to oncoming traffic
- Two-way traffic ahead
- One-way road
- You have priority over oncoming traffic on the narrow section ahead
显示答案
答案: D. You have priority over oncoming traffic on the narrow section ahead
The large white arrow is your direction. Oncoming traffic (the red arrow) must wait for you, but still take care.
第17题，共25题
What does this sign mean?
- No motorway entry for trucks
- End of the motorway
- Slow lane ends
- Motorway closed: turn back
显示答案
答案: B. End of the motorway
The red stripe ends the motorway. Normal road rules and speed limits apply again.
第18题，共25题
What does this sign mean?
- Toll road: 10% charge
- Steep hill upwards
- Steep hill downwards
- Road may flood
显示答案
答案: C. Steep hill downwards
The wedge shows a steep descent; the number is the slope. Use a lower gear so you do not overheat your brakes.
第19题，共25题
You must brake hard in an emergency in a car with ABS. What should you do?
- Pull the handbrake
- Brake gently to avoid the vibration
- Press the brake pedal fully and keep pressing, even if it vibrates
- Pump the brake pedal on and off
显示答案
答案: C. Press the brake pedal fully and keep pressing, even if it vibrates
With ABS, keep firm pressure on the pedal. The vibration is normal and the wheels will not lock, so you can still steer.
第20题，共25题
Why should nobody smoke at the scene of a crash?
- It confuses emergency callers
- Leaking fuel could catch fire
- It is rude to the police
- It sets off airbags
显示答案
答案: B. Leaking fuel could catch fire
Fuel or other liquids may be leaking, so avoid anything that could start a fire.
第21题，共25题
What does this sign mean?
- Coach parking
- School bus may stop
- Lane or road for buses only
- Bus stop: no stopping for other vehicles
显示答案
答案: C. Lane or road for buses only
The bus on a blue disc reserves the lane for buses. Other vehicles may use it only if an extra plate allows them.
第22题，共25题
An injured person at a crash scene asks for water. What should you do?
- Give them alcohol to calm them
- Give them water at once
- Do not give them anything to eat or drink
- Give them a strong coffee
显示答案
答案: C. Do not give them anything to eat or drink
Injured people should not eat or drink, because they may need surgery or may choke.
第23题，共25题
Traffic is queuing over a level crossing. When may you drive onto the crossing?
- As soon as the car in front moves
- Whenever the lights are off
- At any time, because trains stop for cars
- Only when there is room for your whole vehicle on the other side
显示答案
答案: D. Only when there is room for your whole vehicle on the other side
If you enter while the exit is blocked, you could be trapped on the tracks when the barriers close.
第24题，共25题
In which direction do you drive around a roundabout in continental Europe?
- Either way, depending on your exit
- Anticlockwise
- Clockwise at night only
- Clockwise
显示答案
答案: B. Anticlockwise
With right-hand traffic you drive anticlockwise, keeping the central island on your left.
第25题，共25题
Why must rear-seat passengers also wear seat belts?
- It is only to avoid a fine
- In a crash they can be thrown forward and injure themselves and people in front
- Belts in the rear are only for children
- Rear seats have no other protection rules
显示答案
答案: B. In a crash they can be thrown forward and injure themselves and people in front
An unbelted rear passenger hits the seats and people in front with great force in a crash.

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