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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively

both compressive
compressive and tensile
tensile and compressive
both tensile

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Concrete Technology and Design of Concrete Structures
Prestress loss due to friction occurs

None of these
only in pretensioned beams
only in post-tensioned beams
in both post-tensioned and preten-sioned beams

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Concrete Technology and Design of Concrete Structures
If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be

0.35 d
0.40 d
0.45 d
dependent on grade of concrete also

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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

more than 1 m
750 mm
600 mm
900 mm

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Concrete Technology and Design of Concrete Structures
To determine the modulus of rupture, the size of test specimen used is

100 x100 x700 mm
100 x100 x500 mm
150 x150 x500 mm
150 x150 x700 mm

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Concrete Technology and Design of Concrete Structures
In counterfort type retaining walls i) the vertical slab is designed as a continuous slab ii) the heel slab is designed as a continuous slab iii) the vertical slab is designed as a cantilever iv) the heel slab is designed as a cantilever The correct answer is

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

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