RCC Structures Design
A foundation is called shallow if its depth, is

Three-fourth of its width
Equal to its width
One-fourth of its width
Half of its width

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

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

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