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

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

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RCC Structures Design
A pre-stressed concrete member is preferred because

Removal of cracks in the members due to shrinkage
Its dimensions are not decided from the diagonal tensile stress
All listed here
Large size of long beams carrying large shear force need not be adopted

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