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Electric Traction

Electric Traction
The return circuit for tram cars is through A. Neutral wire

Common earthing
Rails
Cables
Neutral wire

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Electric Traction
Specific energy consumption becomes

More on steeper gradient
More with high train resistance
All of the listed here
Less if distance between stops is more

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Electric Traction
The resistance encountered by a train in motion is on account of

Friction at the track
All of the listed here
Friction at various parts of the rolling stock
Resistance offered by air

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Electric Traction
________ have maximum unbalanced forces.

Electric locomotives
All of the listed here
Diesel locomotives
Steam locomotives

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Electric Traction
Which of the following is an advantage of electric traction over other methods of traction?

Better braking action
All of the listed here
Faster acceleration
No pollution problems

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Electric Traction
The air resistance to the movement of the train is proportional to

1/speed
(speed)3
speed
(speed)2

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