Railway Engineering
The correct relation between curve lead (CL), switch lead (SL) and lead of cros¬sing (L) is given by

SL = L + CL
L = (CL+SL)/2
L =CL-SL
CL = L – SL

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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:

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

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