Design of Concrete Structures-Data Intensity 2 Multiple Questions and Answers.




1.Increase in the moisture content in concrete______?
A. reduces the strength
B. increases the strength
C. does not change the strength
D. all of the above

2.The relation between modulus of rupturefcr and characteristic strength of concrete fck is given by___?
A. fcr=0.35Vf7
B. fcr=0.57f7
C. fcr=0.7Vf7
D. fcr=1.2Vf7

3.The approximate value of the ratio between direct tensile strength and flexural strength is__?
A. 0.33
B. 0.5
C. 0.75
D. 1

4.Air entrainment in the concrete increases_______?
A. workability
B. strength
C. the effects of temperature variations
D. the unit weight

5.Workability of concrete is inversely pro�portional to___?
A. time of transit
B. vater-cement ratio
C. the air in the mix
D. size of aggregate

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