3 ptsPTOfficial number: 4129
What increases the risk of a tram skidding?
Explanation
Correct answer: Wet leaves covering the trackway.
Wet leaves, crushed under the weight of a tram, form a very slippery layer on the rails. This layer drastically reduces the friction between the steel wheel and the steel rail, which is a direct cause of loss of grip. Consequently, during braking or accelerating, the tram's wheels can easily go into a skid.