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Electric Traction

Electric Traction
The speed of a superfast train is

100 kmph
More than 100 kmph
60 kmph
75 kmph

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Electric Traction
Which of the following is the advantage of electric braking?

It is instantaneous
It avoids wear of track
More heat is generated during braking
Motor continues to remain loaded during braking

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Electric Traction
In case of a steam engine an average coal consumption per km is nearly

60 to 80 kg
100 to 120 kg
150 to 175 kg
28 to 30 kg

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Electric Traction
Locomotives with monometer bogies have

Lot of skidding
Suitability for passenger as well as freight service
Low coefficient of adhesion
Uneven distribution of tractive effect

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Electric Traction
For 25 kV single phase system power supply frequency is

100 Hz
25 Hz
50 Hz
60 Hz

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

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

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