1. In a group of concrete testing samples, the strongest will be the one: a. Cur
ID: 1845221 • Letter: 1
Question
1. In a group of concrete testing samples, the strongest will be the one: a. Cured underwater for a year b. Moist-cured for a week. then allowed to dry c. Moist-cured for 3 days, then allowed to dry d. Cured in the air for a year 2. Air entrainment is used in concrete to: (select all that apply) a. Create a better surface appearance b. Make the concrete easier to handle during placement c. Increase the resistance of the concrete to freeze-thaw damage d. Strengthen the concrete e. Help evaporate excess water from the curing concrete 3. Vertical reinforcing bars in concrete columns are offset at the top: a. To bring the column back into vertical alignment b. To overlap the beam reinforcing c. To overlap the reinforcing for the column in the next story d. To compensate for curing shrinkage of the concrete e. To allow for the thickness of the column ties 4. Two-way concrete structural slob systems are characterized by: a. Round columns b. The required use of shrinkage/temperature steel c. Beams spanning only one direction d. Column boys that are square or nearly square (in plan) e. A building more than six stories highExplanation / Answer
1) moist cured for a week and then allowed to dry
2) increase the resistance of concrete from freeze thaw damage
3) to overlap beam reinforcement
4) Beam spanning more in one direction
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