Structural Analysis
For under water concreting.

All of these
At least 10 percent more cement is required as compared to dry conditions
De-watering by pumping is not done or until 24 hours thereafter
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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Structural Analysis
The minimum horizontal distance between two parallel main reinforcing bars, is

The diameter of the bar if their diameters are same
The diameter of the longer bar if their diameters are unequal
Greatest value of the above
5 mm more than nominal maximum size of the coarse aggregate

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

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