Concrete Technology and Design of Concrete Structures
In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided on i) bottom face near counterfort ii) top face near counterfort iii) bottom face near centre of span iv) top face near centre of span The correct answer is

both (i) and (iv)
only (ii)
only (i)
both (ii) and (iii)

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Concrete Technology and Design of Concrete Structures
High carbon content in the steel causes

increase in tensile strength but decrease in ductility
decrease in tensile strength but increase in ductility
decrease in both tensile strength and ductility
increase in both tensile strength and ductility

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Concrete Technology and Design of Concrete Structures
If the depth of neutral axis for a singly reinforced rectangular section is represented by kd in working stress design, then the value of k for balanced section

is independant of both ast and acbc where d is the effective depth, ast is per-missible stress in steel in tension and ocbc is permissible stress in concrete in bending compression.
depends on as, only
depends on aCbC only
depends on both crst and acbc

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