Railway Engineering
Creep is the

Vertical movement of rail
Lateral movement of rail
Difference in level of two rails
Longitudinal movement of rail

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Railway Engineering
Stretcher bar is provided

To permit lateral movement of the tongue rail
To ensure exact gauge at the toe of the switch as well as the nose of crossing
To maintain the two tongue rails at the exact distance
To prevent any vertical movement between the wing rail and nose of crossing

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Railway Engineering
A triangle is used for

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

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