ACI- Concrete Field-Testing Technician - Grade 1 Questions & 100% Verified Answers | Latest Update | Already Graded A+

Q1. Start molding specimens for strength tests within 30 minutes after fabricating the composite sample. A. True B. False : B. False ASTM C172 -Para (4.1.2) - Start molding. specimens for strength tests within 15 min after fabricating the composite sample. Q2. The maximum allowable time between obtaining the first and last portions of the composite sample may not exceed 5 minutes. A. True B. False : B. False 2 | P a g e ASTM C172 - Para (4.1)- The elapsed time shall not exceed 15 min. between obtaining the first and final portions of the composite sample. Q3. The composite concrete sample must be protected from sun, wind, contamination and rapid evaporation. A. True B. False : A. True ASTM C172 - Para (4.1.2) Q4. If the concrete contains aggregates larger than those that are appropriate for a size of mold or equipment used, the sample should be wet sieved before making the test. A. True B. False : A. True ASTM C172- Para (6.