What effect can a chipping of the pantograph's graphite inserts induce?
Show the correct answer
Correct answer
B. Excessive rocking, or even break of the overhead line.
Explanation
This question is about the effects of a chipped graphite insert of the pantograph. It may cause excessive swaying and even a break of the overhead contact line - the answer is B.
A chipped insert has an uneven surface, which catches on the contact wire and jerks it as the tram passes. The wire starts to sway, and in an extreme case it may be torn down, which stops tram traffic for a long time and creates a risk of electric shock. Chipping does not increase current consumption (answer A) and certainly does not ensure undisturbed operation of the pantograph (answer C). A damaged insert must not be ignored - the tram must be sent for repair.
Legal basis: Art. 66 para. 1 point 1 of the Road Traffic Act (Prawo o ruchu drogowym)