Railway Engineering
Lead of crossing is the distance from the

toe of the switch to the actual nose of crossing
heel of the switch to the theoretical nose of the crossing
heel of the switch to the toe of the switch
toe of the switch to the theoretical nose of crossing

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Railway Engineering
On a single rail track, goods trains loaded with heavy iron material run starting from ‘A’ to ‘B’ and then empty wagons run from ‘B’ to ‘A’. The amount of creep in the rails:

Will be more in the direction of A to B
Cannot be determined from the given data
Will be more in the direction of B to A
Will be maximum at the middle of A and B

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