What may be the reason for a difficulty in maintaining a straight trajectory of a truck?
Show the correct answer
Correct answer
A. The wearing and excessive clearance in the steering system.
Explanation
In the photo a tractor unit is driving on a road outside town, seen from the front. Difficulty keeping a lorry on a straight course may be caused by wear of the steering gear and excessive play in the steering system - answer A.
The Road Traffic Act requires a vehicle to be built, equipped and maintained so that the steering controls can be used easily, comfortably and reliably while the driver watches the road. Play in the steering gear and in the steering rods means that a movement of the steering wheel does not immediately turn the wheels - the vehicle "wanders" in the lane, and you have to correct it again and again, which is very tiring on a long journey. Worn brake linings (answer B) show up as a longer braking distance or pulling to one side when braking, not as wandering on a straight road. Steering lock stops (answer C) protect the wheels from rubbing at full lock and have no effect on going straight on. Excessive play in the steering is a fault for which the vehicle inspector will not approve the vehicle for traffic.
Legal basis: Art. 66 para. 1 point 1 and 5 of the Road Traffic Act (Prawo o ruchu drogowym)