Concrete Technology and Design of Concrete Structures
In a counterfort retaining wall, the main reinforcement is provided on the i) bottom face in front counterfort ii) inclined face in front counterfort iii) bottom face in back counterfort iv) inclined face in back counterEort The correct answer is

(ii) and (iii)
(i) and (ii),
(iii) and (iv)
(i) and (iv)

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Concrete Technology and Design of Concrete Structures
The critical section for finding maximum bending moment for footing under masonry wall is located

at the middle of the wall
at the edge of the wall
halfway between the middle and edge of the wall
at a distance equal to effective depth of footing from the edge of the wall

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Concrete Technology and Design of Concrete Structures
According to IS : 456-1978, the fiexural strength of concrete is

directly proportional to square root of compressive strength
inversely proportional to square root of compressive strength
directly proportional to compressive strength
inversely proportional to compressive strength

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