Railway Engineering
The slipping of driving wheels of locomotives on the rail surface causes

corrugation of rails
scabbing of rails
hogging of rails
wheel burns

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Railway Engineering
Switch angle is the angle between

the outer face of the stock rail and tongue rail
the outer face of the stock rail and the gauge face of the tongue rail
the gauge face of the stock rail and tongue rail
the gauge face of the stock rail and outer face of the tongue rail

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Railway Engineering
Stretcher bar is provided

To maintain the two tongue rails at the exact distance
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 prevent any vertical movement between the wing rail and nose of crossing

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