Railway Engineering
Consider the following statements: Automatic signalling system results in 1. greater risk 2. higher efficiency 3. avoidance of block instruments 4. higher operating cost Of these statements

1 and 4 are correct
3 and 4 are correct
2 and 3 are correct
I and 2 are correct

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Railway Engineering
A triangle is used for

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

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