Railway Engineering
A treadle bar is used for

interlocking points and signal
setting marshalling yard signals
setting points and crossings
track maintenance

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

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