Important Electric Traction Multiple Choice Questions and Answers

36.  Quadrilateral speed time curve pertains to which of the following services ?

   A. Main line service

   B. Urban service

   C. Sub Urban service

   D. Urban and suburban service

37.  Due to which of the following coefficient of adhesion improves?

   A. Rust on the rails

   B. Dust on the rails

   C. Sand on the rails

   D. All of the above

38.  Coefficient of radiation reduces due to the presence of which of the following ?

   A. Sand on rails

   B. Dew on rails

   C. Oli on the rails

   D. Both B and C

39.  The normal value of adhesion friction is

   A. 0.12

   B. 0.25

   C. 0.40

   D. 0.75

40.  The value of coefficient of adhesion will be high when rails are

   A. Greased

   B. Wet

   C. Sprayed with oil

   D. Cleaned with sand

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