What could be the reasons for the switch points not clinging?
Show the correct answer
Correct answer
C. Snow covering the switch points.
Explanation
The question is about the reasons why the switch blades of the points do not lie tightly against the stock rail. The reason may be snow lying there - the answer is C.
Snow and ice collect in the gap between the switch blade and the stock rail. When the points are being changed, packed snow does not let the switch blade move fully into place, and then the wheels of the tram may go into the gap and cause a derailment. Objects in the space between the tracks (answer A) lie outside the points and do not block the switch blade, and water alone (answer B) flows away and does not form an obstacle. In winter you look at the switch blades with particular care before driving over them. If in doubt, you clean the points before driving over them.
Legal basis: Art. 3 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)