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Electric Traction

Electric Traction
The efficiency of diesel locomotives is nearly

30 to 40 percent
20 to 25 percent
60 to 70 percent
45 to 55 percent

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Electric Traction
Coefficient of adhesion reduces due to the presence of which of the following?

Dew on rails
Sand on rails
Both Dew on rails and Oil on the rails
Oil on the rails

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Electric Traction
In case of locomotives the tractive power is provided by

Double cylinder, single acting steam engine
Single stage steam turbine
Single cylinder double acting steam engine
Double cylinder, double acting steam engine

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Electric Traction
In India diesel locomotives are manufactured at

Varanasi
Jamalpur
Ajmer
Bangalore

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Electric Traction
The wheels of a train, engine as well as bogies, are slightly tapered to

Facilitate braking
Facilitate in taking turns
Increase friction
Reduce friction

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

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