Structural Analysis
Castigliano’s first theorem is applicable

only when principle of superposition is valid
for statically determinate structures only
when the system behaves elastically
None of these

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Structural Analysis
The effective length of lacing is the distance

0.7 of the distance between the inner end rivets of the bar for double lacing
Between the inner end rivets of the bar for single lacing
All of these
Between the inner ends of effective lengths of welds connecting the members

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Structural Analysis
For under water concreting.

All of these
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
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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