Electric Traction
The rate of acceleration on sub-urban or urban services is restricted by the consideration of

Track size
Engine power
Track curves
Passenger Discomfort

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Electric Traction
Which of the following is the disadvantage of electric traction over other systems of traction?

Interference with communication lines
Short time power failure interrupts traffic for hours
High capital outlay in fixed installations beside route limitation
Corrosion problems in the underground pipe work

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