What effect will the use of sandboxes when braking on slippery rails trigger?
Show the correct answer
Correct answer
B. It will reduce the braking distance - reduce wheel slip.
Explanation
The question is about using the sanders when braking on slippery rails. Sand will shorten the braking distance because it will reduce wheel slip - answer B.
The sander drops sand between the wheel and the rail, which increases friction. On slippery rails, for example wet, icy or covered with leaves, the wheels lock easily and the tram slides further than you intend. Sand improves grip, so the wheels do not slide, and the tram stops over a shorter distance. A longer braking distance (answer A) and no effect (answer C) contradict the way this device works. On slippery rails, brake earlier and more gently, and use the sander before the wheels lock.
Legal basis: Art. 3 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)