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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be

Above 0.92
0.75 - 0.80
0.75 - 0.80
0.85 - 0.92

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Concrete Technology and Design of Concrete Structures
In a ring beam subjected to uniformly distributed load
i) shear force at mid span is zero
ii) shear force at mid span is maximum
iii) torsion at mid span is zero
iv) torsion at mid span is maximum
The correct answer is

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

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Concrete Technology and Design of Concrete Structures
Critical section for shear in case of flat slabs is at a distance of

effective depth of slab from periphery of column/drop panel
d/2 from periphery of column/capital/ drop panel
at the drop panel of slab
at the periphery of column

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

the unit weight
workability
the effects of temperature variations
strength

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

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

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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 oni) bottom face near counterfortii) top face near counterfortiii) bottom face near centre of spaniv) top face near centre of span The correct answer is

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

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