Last Answer : When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when wheel base of axles is more, degree of curvature is more.
Last Answer : The value of co-efficient of adhesion will be high when rails are cleaned with sand.
Last Answer : The normal value of adhesion friction is 0.25.
Last Answer : Co-efficient of adhesion is low in case of D.C. traction than in the case of AC. traction.