Railway Engineering
A triangle is used for

Transferring wagons to and from parallel tracks without shunting
Changing the direction of engine
Preventing the vehicles from running off the track
Separating all the sidings and shunting lines from main lines

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

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