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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
20
15

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

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

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Electric Traction
An ideal traction system should have

Equipment capable of withstanding large temporary loads
High starting tractive effort
Easy speed control
All of the listed here

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Electric Traction
Suri transmission is

Hydro pneumatic
Mechanical electrical
Hydro mechanical
Electrical pneumatic

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Electric Traction
_________ frequency is not common in low frequency traction system

None of the listed here
40 Hz
16 Hz
25 Hz

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Electric Traction
The efficiency of diesel locomotives is nearly

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

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