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Electric Traction

Electric Traction
_________ frequency is not common in low frequency traction system

16 Hz
25 Hz
40 Hz
None of the listed here

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Electric Traction
Speed-time curve of main line service differs from those of urban and suburban services on following account

It has longer coasting period
All of the listed here
It has longer free running period
Accelerating and braking periods are comparatively smaller

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

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

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Electric Traction
In case of steam engines the steam pressure is

5 to 8 kgf/cm²
10 to 15 kgf/cm²
1 to 4 kgf/cm²
25 to 35 kgf/cm²

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Electric Traction
For diesel locomotives the range of horsepower is

1500 to 2500
500 to 1000
1000 to 2000
2000 to 2500

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Electric Traction
The horsepower of steam locomotives is

1500 to 2000
2500 to 3000
500 to 1000
Up to 1500

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