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

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

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Railway Engineering
The treadle bar is provided

near and parallel to inner side of one of the rails
near and parallel to inner side of both the rails
in the middle of the track a little in front of the toes of the tongue rail
at right angle to the rail

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