Wales Driving Theory Test Practice 2026：第4套练习测试

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

驾驶
威尔士
290道题
核对于2026年10月10日

第1题，共25题
You are waiting to pull out of a junction. When should you go?
- Only when there is a gap large enough for you to join safely
- As soon as a driver on the main road flashes their lights
- When traffic on the main road is moving slowly
- When you have crept halfway over the give way lines
显示答案
答案: A. Only when there is a gap large enough for you to join safely
Rule 170: look all around before you emerge, and do not pull out until there is a safe gap.
第2题，共25题
Your car is stopped on a public road for some time. What does the law say about the engine?
- You must not leave it running unnecessarily
- You may leave it running while the car is unattended
- You must leave it running to charge the battery
- You must switch it off only on motorways
显示答案
答案: A. You must not leave it running unnecessarily
Rule 123: you must not leave a vehicle engine running unnecessarily while it is stationary on a public road.
第3题，共25题
You are going to take an exit to the right at a roundabout. What should you normally do as you approach?
- Signal left and use the left-hand lane
- Signal left and use the right-hand lane
- Do not signal until you leave
- Signal right and use the right-hand lane
显示答案
答案: D. Signal right and use the right-hand lane
Rule 186: when taking an exit to the right, signal right and approach in the right-hand lane, then signal left after passing the exit before yours.
第4题，共25题
What does this sign mean?
- Advised speed 30 mph
- Maximum speed 30 mph
- Minimum speed 30 mph
- End of the 30 mph limit
显示答案
答案: B. Maximum speed 30 mph
A number inside a red circle is a maximum speed limit. You must not drive faster than 30 mph.
第5题，共25题
What does this sign mean?
- Keep 6 feet 6 inches from other vehicles
- No vehicles taller than 6 feet 6 inches
- No vehicles wider than 6 feet 6 inches
- Road narrows in 6 feet 6 inches
显示答案
答案: C. No vehicles wider than 6 feet 6 inches
Arrows pointing in from the sides show a width limit. Vehicles wider than the size shown must not pass.
第6题，共25题
A cyclist is riding about 1 metre out from a line of parked cars. Why?
- To avoid a car door that opens suddenly
- So they can overtake cars more easily
- To slow down the traffic behind them
- Because cyclists must not ride near the kerb
显示答案
答案: A. To avoid a car door that opens suddenly
Rule 213: cyclists are advised to keep at least a door's width, or 1 metre, from parked cars.
第7题，共25题
Should you reverse out of a side road into a main road?
- No, you should not
- Yes, if you are quick
- Yes, at night when it is quiet
- Yes, if you sound your horn
显示答案
答案: A. No, you should not
Rule 201: do not reverse from a side road into a main road.
第8题，共25题
Between which hours does the Highway Code advise you to avoid long journeys?
- 6 am and 9 am
- 2 pm and 4 pm
- Midnight and 6 am
- 8 pm and 10 pm
显示答案
答案: C. Midnight and 6 am
Rule 91 advises avoiding long journeys between midnight and 6 am, when you are more likely to feel sleepy.
第9题，共25题
What colour is the background of direction signs on primary routes?
- White
- Green
- Brown
- Blue
显示答案
答案: B. Green
Traffic signs: direction signs on primary routes have green backgrounds.
第10题，共25题
A pedestrian is walking in the road on a lane with no pavement. How much space should you give them?
- At least half a metre
- At least 1 metre, at any speed
- At least 2 metres, at a low speed
- None; they should step aside
显示答案
答案: C. At least 2 metres, at a low speed
Rule 163: allow at least 2 metres for pedestrians walking in the road and keep to a low speed.
第11题，共25题
What does this sign mean?
- Zebra crossing ahead
- Pedestrian zone, no vehicles
- Footbridge ahead
- Pedestrians in the road ahead
显示答案
答案: A. Zebra crossing ahead
A person walking over black and white stripes warns of a zebra crossing ahead.
第12题，共25题
What is the national speed limit for a car on a dual carriageway?
- 50 mph
- 70 mph
- 80 mph
- 60 mph
显示答案
答案: B. 70 mph
Rule 124: the national speed limit for cars on dual carriageways is 70 mph.
第13题，共25题
What does this sign mean?
- Two-way traffic crosses a one-way road
- Give way to oncoming vehicles
- Contra-flow bus lane
- You have priority over vehicles coming from the opposite direction
显示答案
答案: D. You have priority over vehicles coming from the opposite direction
On this blue sign your white arrow is the larger one, so oncoming traffic must give way to you.
第14题，共25题
A pedestrian is waiting at a zebra crossing. How should you let them know they can cross?
- Sound your horn briefly to tell them to cross
- Stop and wait, without waving or flashing your lights
- Flash your headlights to show you have seen them
- Wave them across so they know it is safe
显示答案
答案: B. Stop and wait, without waving or flashing your lights
Rule 195 says do not wave, flash your lights or use your horn to invite pedestrians across. Another vehicle may be coming.
第15题，共25题
The rear of your car skids to the right. Which way should you steer?
- To the left
- Keep straight and brake hard
- Turn the wheel fully to the left
- To the right
显示答案
答案: D. To the right
Rule 119: steer in the direction of the skid. If the rear skids to the right, steer to the right.
第16题，共25题
When may you use front or rear fog lights?
- At night on any unlit country road
- Whenever it is raining, even lightly
- Only when visibility is seriously reduced
- Whenever you drive on a motorway
显示答案
答案: C. Only when visibility is seriously reduced
Rule 236: you must not use fog lights unless visibility is seriously reduced. They dazzle others and can hide your brake lights.
第17题，共25题
How should cyclists and motorcyclists cross tram tracks?
- Diagonally, at a good speed
- Riding along between the rails
- Directly, at right angles to the rails
- At a shallow angle to the rails
显示答案
答案: C. Directly, at right angles to the rails
The tramway rules say it is safest for cyclists and motorcyclists to cross tram tracks directly at right angles. Give them extra space.
第18题，共25题
Why should you look round as well as using your mirrors before you change lanes?
- Looking round tells other drivers you are about to move
- Mirrors have blind spots where a vehicle can be hidden
- It is quicker than using the mirrors
- Mirrors make vehicles look closer than they are
显示答案
答案: B. Mirrors have blind spots where a vehicle can be hidden
Rule 161: mirrors do not show everything. A quick look round covers the blind spots.
第19题，共25题
There are double white lines in the middle of the road, and the line nearest you is solid. What does this mean?
- You may cross it to overtake if the road is clear
- Do not cross it, except in a few allowed cases
- You may park next to it at any time
- It marks the edge of a bus lane
显示答案
答案: B. Do not cross it, except in a few allowed cases
Rules 129 and 165: you must not cross or straddle double white lines with a solid line nearest you, except in the cases the Code lists.
第20题，共25题
A broken white centre line becomes longer, with shorter gaps. What does this mean?
- You may overtake freely
- A bus lane is starting
- There is a hazard ahead
- The road is ending
显示答案
答案: C. There is a hazard ahead
Rule 127: when the centre line lengthens and the gaps shorten, it is a hazard warning line. Only cross it if the road is clear and you need to.
第21题，共25题
What is the speed limit for a car on a motorway?
- 60 mph
- 80 mph
- 70 mph
- 65 mph
显示答案
答案: C. 70 mph
Rule 124: the motorway limit for cars and motorcycles is 70 mph.
第22题，共25题
What does this sign mean?
- Cycle shop ahead
- Cycle route ahead
- No cycling
- Route for pedal cycles only
显示答案
答案: B. Cycle route ahead
A bicycle in a red triangle warns that a cycle route joins or crosses the road ahead.
第23题，共25题
On a fast road in good, dry conditions, what gap should you leave behind the vehicle in front?
- At least one second
- At least half a second
- One car length
- At least two seconds
显示答案
答案: D. At least two seconds
Rule 126: leave at least a two-second gap on high-speed roads and in tunnels.
第24题，共25题
What does this sign mean?
- No left turn
- Turn left ahead
- Bend to the left ahead
- Left lane closed ahead
显示答案
答案: A. No left turn
A red circle with a red bar across a left arrow means you must not turn left.
第25题，共25题
You are driving along a residential street with parked cars. Which hazard should you expect?
- Children running out between parked cars
- Tractors pulling out of fields
- Trams crossing at high speed
- Vehicles joining from a slip road
显示答案
答案: A. Children running out between parked cars
Rule 152: in residential streets, look out for children running out between parked cars, opening doors and vehicles pulling out.

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