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Electric Traction

Electric Traction
The value of coefficient of adhesion will be high when rails are

Greased
Cleaned with sand
Sprayed with oil
Wet

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Electric Traction
Specific energy consumption becomes

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

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

Neutral wire
Cables
Common earthing
Rails

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

Track size
Track curves
Engine power
Passenger Discomfort

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Electric Traction
For which of the following locomotives the maintenance requirements are the least?

Electric locomotives
All of the listed here
Steam locomotives
Diesel locomotives

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Electric Traction
Watt-hours per tonne km is usually the specific energy consumption for suburban services.

150-200
100-150
50 - 75
120-150

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