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Electric Traction

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

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

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Electric Traction
The wheels of a train, engine as well as bogies, are slightly tapered to

Facilitate in taking turns
Reduce friction
Increase friction
Facilitate braking

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Electric Traction
The efficiency of diesel locomotives is nearly

30 to 40 percent
20 to 25 percent
60 to 70 percent
45 to 55 percent

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Electric Traction
Suri transmission is

Electrical pneumatic
Mechanical electrical
Hydro mechanical
Hydro pneumatic

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Electric Traction
In main line service as compared to urban and suburban service

All of the listed here
Distance between the stops is more
Maximum speed reached is high
Acceleration and retardation rates are low

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Electric Traction
The friction at the track is proportional to

1/(speed)²
None of the listed here
1/speed
Speed

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