Bulking of sand is maximum if moisture content is about____________?
A. 2 %
B. 4%
C. 6%
D. 10%
Design of Concrete Structures
As compared to ordinary portland cement, high alumina cement has______________?
As compared to ordinary portland cement, high alumina cement has______________?
A. higher initial setting time but lower final setting time
B. lower initial setting time but higher final setting time
C. higher initial and final setting times
D. lower initial and final setting times
In order to obtain the best workability of concrete, the preferred shape of aggregate is_______________?
In order to obtain the best workability of concrete, the preferred shape of aggregate is_______________?
A. rounded
B. elongated
C. angular
D. all of the above
Modulus of rupture of concrete is a measure of_______________?
Modulus of rupture of concrete is a measure of_______________?
A. flexural tensile strength
B. direct tensile strength
C. compressive strength
D. split tensile strength
The percentage of voids in cement is approximately_______________?
The percentage of voids in cement is approximately_______________?
A. 25%
B. 40%
C. 60%
D. 80%
To determine the modulus of rupture, the size of test specimen used is_______________?
To determine the modulus of rupture, the size of test specimen used is_______________?
A. 150 x150 x500 mm
B. 100 x100 x700 mm
C. 150 x150 x700 mm
D. 100 x100 x500 mm
The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called________________?
The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called________________?
A. segregation
B. bleeding
C. bulking
D. creep
Workability of concrete is inversely pro¬portional to______________?
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
Air entrainment in the concrete increases________________?
Air entrainment in the concrete increases________________?
A. workability
B. strength
C. the effects of temperature variations
D. the unit weight
The approximate value of the ratio between direct tensile strength and flexural strength is_____________?
The approximate value of the ratio between direct tensile strength and flexural strength is_____________?
A. 0.33
B. 0.5
C. 0.75
D. 1.0