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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
To minimize the effect of differential settlement, the area of a footing should be designed for

Dead load + live load
Live load + fraction of dead load
Dead load + fraction of live load
Dead load only

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

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Concrete Technology and Design of Concrete Structures
Ratio of permissible stress in direct compression and bending compression is

between 1.5 and 2.0
less than 1
between 1 and 1.5
greater than 2

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Concrete Technology and Design of Concrete Structures
The maximum value of hoop compression in a dome is given by (where, w = load per unit area of surface of dome R = radius of curvature d = thickness of dome)

wR/d
wR/2d
wR / 4d
2wR/d

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

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

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