Railway Engineering
Which of the following types of sleepers is preferred on joints ?

steel trough sleeper
concrete sleeper
wooden sleeper
CST-9 sleeper

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Railway Engineering
Stretcher bar is provided

To maintain the two tongue rails at the exact distance
To ensure exact gauge at the toe of the switch as well as the nose of crossing
To prevent any vertical movement between the wing rail and nose of crossing
To permit lateral movement of the tongue rail

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