Railway Engineering
The distance through which the tongue rail moves laterally at the toe of the switch for movement of trains is called

heel divergence
throw of the switch
flangeway clearance
None of these

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Railway Engineering
Lead of crossing is the distance from the

heel of the switch to the toe of the switch
toe of the switch to the theoretical nose of crossing
heel of the switch to the theoretical nose of the crossing
toe of the switch to the actual nose of crossing

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