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Concrete Technology and Design of Concrete Structures

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

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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
dependent on grade of concrete also
0.45 d

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Concrete Technology and Design of Concrete Structures
The recommended value of modular ratio for reinforced brick work is

40
88
99
35

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Concrete Technology and Design of Concrete Structures
The factor of safety for

None of these
steel and concrete are same
steel is lower than that for concrete
steel is higher than that for concrete

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Concrete Technology and Design of Concrete Structures
The depth of footing for an isolated column is governed byi) maximum bending momentii) shear forceiii) punching shear The correct answer is

(i) and (iii)
(i), (ii) and (iii)
only (i)
(i) and (ii)

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Concrete Technology and Design of Concrete Structures
The centroid of compressive force, from the extreme compression fiber, in limit state design lies at a distance of (where xu is the depth of neutral axis at the limit state of collapse)

0.446 xu
0.416 xu
0.573 xu
0.367 xu

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