ACI Concrete Field Testing Technician - Grade I Practice Exam

For optimal consistency of concrete, the level after consolidation should be close to what?

1. Below the top of the measure

2. At the top of the measure

3. Above the top of the measure

4. 1 inch above the measure

The correct answer is: At the top of the measure

For optimal consistency of concrete, the level after consolidation should be at the top of the measure. This indicates that the concrete has been properly mixed, well consolidated, and has appropriate workability. When the level is at the top of the measure, it shows that there are no significant air voids or segregation, which would compromise the integrity and performance of the concrete mix. Having the concrete level at the top of the measure ensures that it has sufficient volume as expected for the specific test, which in turn reflects the accurate representation of the mix's consistency. This crucial detail helps in achieving the targeted strength and durability of the final concrete structure.