Structural Analysis
The three moments equation is applicable only when

There is no settlement of supports
There is no discontinuity such as hinges within the span
The beam is prismatic
The spans are equal

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Structural Analysis
Pick up the incorrect statement from the following:

None of these
The gross section of the web of channels is the depth of the web multiplied by its thickness
The gross section of the web of rolled I-beams is the depth of the beam multiplied by the web thickness
The gross section of the web of plate girders is the depth of the web plate multiplied by its thickness

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

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

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