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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
Which of the following R.C. retaining walls is suitable for heights beyond 6m?

All of these
counterfort type
L-shaped wall
T-shaped wall

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Concrete Technology and Design of Concrete Structures
For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankine’s theory

can be more than 1
is always greater than 1
is always less than 1
can be less than 1

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Concrete Technology and Design of Concrete Structures
Sinking of an intermediate support of a continuous beami) reduces the negative moment at supportii) increases the negative moment at supportiii) reduces the positive moment at center of spaniv) increases the positive moment at center of span The correct answer is

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

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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

600 mm
900 mm
more than 1 m
750 mm

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Concrete Technology and Design of Concrete Structures
The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by

fcr>fcs>fc.
fcr
fc5>fcr>fC
tcr – rcs = tct

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

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