DTT Speed and Stopping Distances 3

Question 1

What does reaction distance depend on?

Accepted Answer

The driver's speed and reaction time

Answer

Road surface only

Answer

The weight of the vehicle

Answer

Tyre condition only

Question 2

A speed limit sign showing '30' in a red circle in Ireland means:

Accepted Answer

Mandatory — you must not exceed 30 km/h

Answer

Advisory — you may travel at 30 km/h

Answer

Minimum speed of 30 km/h

Answer

School zone only limit of 30 km/h

Question 3

Why should drivers reduce speed when approaching a junction?

Accepted Answer

To allow more stopping distance if a hazard emerges from the junction

Answer

To save fuel

Answer

Because junctions are always wet

Answer

It is not necessary if the road ahead looks clear

Question 4

What is the effect of worn tyres on stopping distance?

Accepted Answer

Longer stopping distance due to reduced grip

Answer

No effect on stopping distance

Answer

Shorter stopping distance due to more contact

Answer

Only affects stopping distance on motorways

Question 5

If a vehicle's speed increases from 50 km/h to 100 km/h, the braking distance:

Accepted Answer

Quadruples

Answer

Doubles

Answer

Triples

Answer

Stays the same

Question 6

When should you increase the two-second following distance to four seconds?

Accepted Answer

When driving at night, in rain, or in fog

Answer

On motorways only

Answer

Only in a school zone

Answer

Only when carrying passengers

Question 7

What is the maximum speed allowed for a vehicle towing a trailer on an Irish motorway?

Accepted Answer

100 km/h

Answer

120 km/h

Answer

80 km/h

Answer

Same as cars — 120 km/h