Structural Analysis
The effective and actual lengths of a cantilever are same if continuous at the support,

Restrained against torsion at the support and free at the end
Unstrained against torsion at the support and free at the end
None of these
With partial restraint against torsion of the support and free at the end

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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 span is midway between the centre of gravity of the load system and the wheel load under consideration
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
To generate the j th column of the flexibility matrix

a unit displacement is applied at co-ordinate j and the forces are calculated at all coordinates
a unit force is applied at coordinate j and the displacements are calculated at all coordinates
a unit force is applied at coordinate j and the forces are calculated at all coordinates
a unit displacement is applied at co-ordinate j and the displacements are calculated at all co-ordinates

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