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Electric Traction

Electric Traction
Which of the following is the voltage for single phase A.C. system?

220 V
5 kV
220 v
11 kV

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Electric Traction
Which of the following is an advantage of electric traction over other methods of traction?

No pollution problems
Faster acceleration
All of the listed here
Better braking action

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Electric Traction
Vacuum is created by which of the following?

Vacuum pump
Ejector
None of the listed here
Any of the listed here

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

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

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

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

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Electric Traction
Long distance railways use which of the following?

25 kV single phase A.C.
25 kV three phase A.C.
200 V D.C.
25 kV two phase A.C.

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