RCC Structures Design
If the bearing capacity of soil is 10 tonnes/cm² and the projection of plain concrete footing from walls, is a cm, the depth D of footing is

D = 0.775 a
D = 0.775 √a
D = 0.775 a²
D = 0.0775 a

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RCC Structures Design
Pick up the assumption for the design of a pre-stressed concrete member from the following:

All listed here
Variation of stress in reinforcement due to changes in external loading is negligible
A transverse plane section remains a plane after bending
During deformation limits, Hook's law is equally applicable to concrete as well as to steel

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RCC Structures Design
In a beam the local bond stress Sb, is equal to

Leaver arm/(Shear force × Total perimeter of reinforcement)
Leaver arm/(Bending moment × Total perimeter of reinforcement)
Total perimeter of reinforcement/(Leaver arm × Shear force)
Shear force/(Leaver arm × Total perimeter of reinforcement)

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