RCC Structures Design
If the shear stress in a R.C.C. beam is

All of these
Equal or less than 5 kg/cm², no shear reinforcement is provided
Greater than 4 kg/cm², but less than 20 kg/cm², shear reinforcement is provided
Greater than 20 kg/cm², the size of the section is changed

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

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

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