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
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________________?
A. Workability
B. Strength
C. The effects of temperature variations
D. The unit weight
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
Admixtures which cause early setting, and hardening of concrete are called_______________?
A. Workability admixtures
B. Accelerators
C. Retarders
D. Air entraining agents