Railway Engineering
Which of the following mechanical devices is used to ensure that route cannot be changed while the train is on the point even after putting back the signal ?

iock bar
stretcher bar
point lock
detectors

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Railway Engineering
Flange-way clearance is the distance

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

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