Structural Analysis
Castigliano’s first theorem is applicable

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

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Structural Analysis
The minimum horizontal distance between two parallel main reinforcing bars, is

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

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