RCC Structures Design
In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at

A point of zero shear force
More loaded column
A point of the maximum shear force
Less loaded column

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RCC Structures Design
A pre-stressed concrete member is preferred because

All listed here
Its dimensions are not decided from the diagonal tensile stress
Large size of long beams carrying large shear force need not be adopted
Removal of cracks in the members due to shrinkage

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