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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

10
5
15
20

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Electric Traction
When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when

Degree of curvature is more
Both of the listed here
Wheel base of axles is more
None of the listed here

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Electric Traction
Specific energy consumption is least in _______ service.

None of the listed here
Suburban
Main line
Urban

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

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

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Electric Traction
Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction?

Reduced current method
Series parallel operation of motors
Tap changing control of transformer
All of the listed here

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Electric Traction
The speed of a locomotive is controlled by

Gear box
Regulating steam flow to engine
Flywheel
Applying brakes

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