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车速与车距 — BTT 练习题

限速、安全跟车距离、两秒规则，以及刹车距离。

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车速与车距题目

Unless otherwise stated, The speed limit of all roads in Singapore is:

70km/h

60km/h

50km/h 正确答案

The default road speed limit is 50 km/h unless a sign states another limit. A lower limit may still be necessary when traffic, weather or visibility makes 50 km/h unsafe.

打开本题 Singapore Police Force Online Learning Portal: Basic Theory of Driving

Which of the following can be taken as a rule of thumb to avoid tail-gating?

The Four-Second rule.

The Two-Second rule. 正确答案

The Three-Second rule.

Use the two-second rule to check a safe following gap in good conditions. Increase the gap substantially in rain, poor visibility or other conditions that lengthen stopping distance.

打开本题 Singapore Police Force Online Learning Portal: Basic Theory of Driving

What might be the consequence of tailgating?

The front vehicle might stop suddenly.

The behind vehicle might crash into the front vehicle. 正确答案

The behind vehicle might traveled too fast.

Tailgating leaves too little time and distance to react when the vehicle ahead slows or stops. Keep a proper following gap to avoid a rear-end collision.

打开本题 Singapore Police Force Online Learning Portal: Basic Theory of Driving

Which of the following is true?

Reaction Distance = Stopping Distance - Braking Distance 正确答案

Stopping Distance = Braking Distance - Reaction Distance

Braking Distance = Reaction Distance - Stopping Distance

Stopping distance has two parts: reaction distance travelled before braking begins, and braking distance travelled while the vehicle slows to a stop.

打开本题 Singapore Police Force Online Learning Portal: Basic Theory of Driving

What are the consequences of tailgating?

Driver in front will drive faster

No consequences

Driver in front of you may become nervous,stop suddenly and accident might occur 正确答案

Tailgating pressures the driver ahead and removes your own stopping margin. It can lead to sudden braking and a rear-end collision.

打开本题 Singapore Police Force Online Learning Portal: Basic Theory of Driving

Following another vehicle very closely behind

May lead to an accident 正确答案

Is encouraged as it gives more space to the vehicles behind

Is very safe as the visibility will be clear

Keep a safe following gap; tailgating removes the time and distance needed to avoid a rear-end collision.

打开本题 Singapore Police Force Online Learning Portal: Basic Theory of Driving

When your vehicle is heavily loaded, the stopping distance will

Increase 正确答案

Decrease

Remain the same

A heavily loaded vehicle needs more distance to stop, so leave a larger following gap and reduce speed where necessary.

打开本题 Singapore Police Force Online Learning Portal: Basic Theory of Driving

'Two-second rule' can be applied when driving at

High speed

Any speed 正确答案

Low speed

Use the two-second rule at any speed in good, dry conditions; its time-based method automatically increases distance as speed rises.

打开本题 Singapore Police Force Online Learning Portal: Basic Theory of Driving

A safe following distance is at least one car length for every ___ of your speed.

16 km/h 正确答案

10 km/h

20 km/h

A traditional distance guide is at least one car length for every 16 km/h, although the two-second rule is a more reliable way to judge a gap.

打开本题 Singapore Police Force Online Learning Portal: Basic Theory of Driving

If the speed limit of the road is 50km/h, and the maximum speed of your vehicle is 120km/h. which of the following speed you should drive at:

60km/h

45km/h 正确答案

120km/h

A vehicle’s capability does not override the road limit. Choose a speed within the 50 km/h limit and suitable for conditions.

打开本题 Singapore Police Force Online Learning Portal: Basic Theory of Driving

When should you obey the "Reduce Speed Now" sign?

Only if you wish to

If your speed is above 50km/h.

Always. 正确答案

Obey regulatory speed-reduction signs.

打开本题 Singapore Police Force Online Learning Portal: Basic Theory of Driving

If you are traveling at a speed of 80km/h, how many vehicle(s) length at least should be adhered to between your vehicle and the vehicle in front?

5 正确答案

For the question "If you are traveling at a speed of 80km/h, how many vehicle(s) length at least should be adhered to between your vehicle and the vehicle in front?", the correct answer is "5" because the basic rule is to maintain at least one vehicle length for every 16km/h of your vehicle speed.

打开本题 Singapore Police Force Online Learning Portal: Basic Theory of Driving

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