Railway Engineering
Which of the following factors govern the choice of the gauge ? i) volume and nature of traffic ii) speed of train iii) physical features of the country The correct answer is

(i), (ii) and (iii)
only (i)
both (ii) and (iii)
both (i) and (ii)

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Railway Engineering
Stretcher bar is provided

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

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