Railway Engineering
Flange-way clearance is the distance

Between the gauge faces of the stock rail and the tongue rail
Between the adjoining faces of the running rail and the check rail near the crossing
None of these
Through which the tongue rail moves laterally at the toe of the switch

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Railway Engineering
Switch angle is the angle between

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 outer 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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