Characteristics of Pantograph collector

Q.  Pantograph collector is used in railways where the train runs at 100 to 130 kmph. Which among the following is true about pantograph collector?
- Published on 07 Sep 15

a. It is unidirectional
b. The erection of the overhead network is complicated
c. Its height cannot be varied
d. None of these

ANSWER: None of these

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