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

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

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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