Electric Traction
Series motor is not suited for traction duty due to which of the following account?

Less current drain on the heavy load torque
Commutating property at heavy load
Self relieving property
Current surges after temporary switching off supply

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

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

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