Flangeway clearance is the distance

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This question was previously asked in

JKSSB JE (Civil) Official Paper (Held On: 19 Nov, 2023)

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

Answer 1

Explanation:

Flangeway Clearance

Flangeway clearance is the gap provided between the running rail and the check rail to allow the wheel flange to pass through safely without interference.
It is critical near crossings and turnouts, especially where the wheels might otherwise derail due to lack of continuous rail support.
This clearance helps in guiding the wheel along the intended path and avoids collisions or excessive wear between the flange and the check rail.

Additional Information Check Rail

A check rail (also called a guard rail) is laid parallel to the running rail, usually on the inner side of curves and crossings.
Its function is to guide the wheel flange and prevent derailment at locations like crossings, bridges, or sharp curves.
It works in coordination with flangeway clearance to ensure smooth passage of wheels.

Switch (Turnout)

A switch or point is a movable arrangement in track that allows a train to be diverted from one track to another.
It consists of tongue rails (switch rails) and stock rails, with the tongue rail moving laterally to connect to either of the diverging tracks.
The point of movement is called the toe of switch.