Structural Analysis
While using three moments equation, a fixed end of a continuous beam is replaced by an additional span of

infinite length
zero moment of inertia
zero length
None of these

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Structural Analysis
Pick up the correct statement applicable to cased columns.

Single I-beam or channels back with or without flange plates may be used
Single I-beam or channels back with or without flange plates may be used
The surface and edges of the steel column should be provided a concrete cover not less than 50 mm
All of these

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