Railway Engineering
Consider the following statements about concrete sleepers.
1. They improve the track modulus.
2. They have good scrap value.
3. They render transportation easy.
4. They maintain the gauge quite satisfactorily of these statements

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

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Railway Engineering
A triangle is used for

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

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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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