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Electric Traction

Electric Traction
The normal value of adhesion friction is

0.50
0.35
0.30
0.25

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

Jolting and skidding
Hammer blow
All of the listed here
Pitching

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Electric Traction
Specific energy consumption is affected by which of the following factors?

Gradient
All of the listed here
Retardation and acceleration values
Distance between stops

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Electric Traction
The air resistance to the movement of the train is proportional to

speed
1/speed
(speed)2
(speed)3

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

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

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

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

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