RCC Structures Design
The length of the straight portion of a bar beyond the end of the hook, should be at least

Thrice the diameter
Four times the diameter
Seven times the diameter
Twice the diameter

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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
During deformation limits, Hook's law is equally applicable to concrete as well as to steel
A transverse plane section remains a plane after bending
All listed here

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RCC Structures Design
Based on punching shear consideration, the overall depth of a combined footing under a column A, is

None of these
(Perimeter of column A × Safe punching stress)/(Load on column A + Upward pressure × Area of the column)
(Area of the column A × Safe punching stress)/Load on column A
(Perimeter of column A × Safe punching stress)/(Load on column A × Upward pressure × Area of the column)

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