Railway Engineering
In a scissors cross-over, the crossings provided are i) 2 obtuse angle crossings ii) 4 obtuse angle crossings iii) 4 acute angle crossings iv) 6 acute angle crossings The correct answer is

(i)and(iv)
(ii) and (iii)
(ii) and (iv)
(i) and (iii)

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Railway Engineering
A triangle is used for

Preventing the vehicles from running off the track
Changing the direction of engine
Transferring wagons to and from parallel tracks without shunting
Separating all the sidings and shunting lines from main lines

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