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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
For a simply supported beam of span 15m, the minimum effective depth to satisfy the vertical deflection limits should be

750 mm
900 mm
600 mm
more than 1 m

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Concrete Technology and Design of Concrete Structures
Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is

32 liters
30 liters
34 liters
28 liters

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Concrete Technology and Design of Concrete Structures
A higher modular ratio shows

higher compressive strength of con-crete
lower tensile strength of steel
higher tensile strength of steel
lower compressive strength of concrete

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

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Concrete Technology and Design of Concrete Structures
If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to

xc
xv
Tv + Tc

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Concrete Technology and Design of Concrete Structures
Air entrainment in the concrete increases

strength
the unit weight
the effects of temperature variations
workability

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