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Electric Traction

Electric Traction
The braking retardation is usually in the range

3 to 5 km phps
15 to 30 km phps
5 to 8 km phps
0.15 to 0.30 km phps

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Electric Traction
Which of the following braking systems on the locomotives is costly?

Regenerative braking on electric locomotives
All braking systems are equally costly
Vacuum braking on steam locomotives
Vacuum braking on diesel locomotives

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Electric Traction
For three-phase induction motors which of the following is the least efficient method of speed control?

Pole changing
Rheostat control
Cascade control
Combination of cascade and pole changing

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Electric Traction
Which of the following state capitals is not on broad gauge track ?

Bhopal
Chandigarh
Lucknow
Jaipur

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Electric Traction
Methods can bring the locomotive to dead stop.

None of the listed here
Regenerative braking
Rheostat braking
Plugging braking

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Electric Traction
Automatic signalling is used for which of the following trains ?

All of the listed here
Suburban and Urban electric trains
Superfast trains
Mail and express trains

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