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Electric Traction

Electric Traction
The number of passenger coaches that can be attached to a diesel engine locomotive on broad gauge is usually restricted to

15
10
20
5

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Electric Traction
The speed of a locomotive is controlled by

Regulating steam flow to engine
Applying brakes
Gear box
Flywheel

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Electric Traction
Tractive effort is required to

Overcome the gravity component of train mass
All of the listed here
Overcome friction, windage and curve resistance
Accelerate the train mass

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Electric Traction
The pulsating torque exerted by steam locomotives causes which of the following?

Hammer blow
All of the listed here
Jolting and skidding
Pitching

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Electric Traction
________ have maximum unbalanced forces.

Electric locomotives
All of the listed here
Steam locomotives
Diesel locomotives

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

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

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