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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Modulus of elasticity of steel as per IS : 456-1978 shall be taken as

2xl06N/cm²
20 kN/cm²
200 kN/cm²
200kN/mm²

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Concrete Technology and Design of Concrete Structures
The compressive strength of 100 mm cube as compared to 150 mm cube is always

less
None of these
equal
more

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Concrete Technology and Design of Concrete Structures
If a beam fails in bond, then its bond strength can be increased most economi-cally by

using thinner bars but more in number
using thicker bars but less in number
increasing the depth of beam
providing vertical stirrups

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Concrete Technology and Design of Concrete Structures
In counterfort type retaining wallsi) the vertical slab is designed as a continuous slabii) the heel slab is designed as a continuous slabiii) the vertical slab is designed as a cantileveriv) the heel slab is designed as a cantileverThe correct answer is

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

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Concrete Technology and Design of Concrete Structures
According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is

0.85 d
0.43 d
0.55 d
0.68 d

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Concrete Technology and Design of Concrete Structures
The average permissible stress in bond for plain bars in tension is

increased by 10% for bars in compression
decreased by 10% for bars in compression
increased by 25% for bars in compression
decreased by 25% for bars in compression

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