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

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

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