2 ptsPTOfficial number: 4080
How should a tram driver behave when driving through places with lowered overhead lines e.g. under a viaduct?
Explanation
Correct answer: Reduce speed over the entire section of the lowered overhead lines.
A reduction in speed on a section with lowered overhead lines is necessary to prevent excessive vibrations of the pantograph (current collector). At a higher speed, this could lead to a loss of contact with the contact wire and, in an extreme case, even to the damage and snapping of the overhead lines.