RCC Structures Design
The effective span of a simply supported slab, is

Distance between the centers of the bearings
Clear distance between the inner faces of the walls plus twice the thickness of the wall
Clear span plus effective depth of the slab
None of these

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RCC Structures Design
The angle of internal friction of soil mass is the angle whose

Tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane
Cosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane
Sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane
None of these

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