Structural Analysis
When a uniformly distributed load, shorter than the span of the girder, moves from left to right, then the conditions for maximum bending moment at a section is that

the load position should be such that the section divides it equally on both sides
the tail of the load reaches the section
the load position should be such that the section divides the load in the same ratio as it divides the span
the head of the load reaches the section

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Structural Analysis
When a series of wheel loads crosses a simply supported girder, the maximum bending moment under any given wheel load occurs when

The centre of span is midway between the centre of gravity of the load system and the wheel load under consideration
The wheel load under consideration is midway between the centre of span and the centre of gravity of the load system
None of these
The centre of gravity of the load system is midway between the centre of span and wheel load under consi-deration

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Structural Analysis
For under water concreting.

De-watering by pumping is not done or until 24 hours thereafter
At least 10 percent more cement is required as compared to dry conditions
All of these
The volume of coarse aggregates shall not be less than one and half times and not more than twice that of fine aggregate

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