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

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

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Railway Engineering
A triangle is used for

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

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