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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures
The individual variation between test strength of sample should not be more than

±5% of average
±20% of average
± 15% of average
± 10% of average

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Concrete Technology and Design of Concrete Structures
The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone

compressive stress
shear stress
tensile stress
bond stress

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Concrete Technology and Design of Concrete Structures
As compared to ordinary portland cement, use of pozzuolanic cement

increases bleeding
reduces workability
increases shrinkage
increases strength

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Concrete Technology and Design of Concrete Structures
The depth of footing for an isolated column is governed by i) maximum bending moment ii) shear force iii) punching shear The correct answer is

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

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Concrete Technology and Design of Concrete Structures
If a beam fails in bond, then its bond strength can be increased most economi-cally by

increasing the depth of beam
using thicker bars but less in number
using thinner bars but more in number
providing vertical stirrups

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

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