Electric Traction
The steam engine provided on steam locomotives is

Double acting condensing type
Single acting non-condensing type
Single acting condensing type
Double acting non-condensing type

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Electric Traction
Coefficient of adhesion is

Low in case of D.C. traction than in the case of AC. traction
High in case of D.C. traction than in the case of AC. traction
All of the listed here
Equal in both AC. and D.C. traction

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