ACI Test Questions and Answers | Verified & Updated 2024

ACI Test Questions and Answers | Verified & Updated 2024 The total time allowed between obtaining the first and final portions of a composite sample is - Answer ️️ -15 minutes When it is necessary to wet sieve the concrete sample, wet sieving should be performed after the individual samples are remixed into a composite sample (T or F) - Answer ️️ -F Tests for slump, temperature, and air content must begin within ______ minutes after obtaining the composite sample - Answer ️️ -5 minutes Begin molding test specimens within ______ minutes after obtaining the composite sample - Answer ️️ -15 minutes The concrete samples should be protected from - Answer ️️ -the sun, wind, and other sources of rapid evaporation, from contamination When test specimens are to be molded, the minimum size of sample obtained is - Answer ️️ - 28 L (1 ft^3) The primary objective of the sampling process is to obtain a representative sample (T or F) - Answer ️️ -T When sampling from a revolving drum truck mixer collect concrete from ______ portions of the batch - Answer ️️ -2 or more Wet sieving is performed - Answer ️️ -when the concrete contains aggregates larger than appropriate for a test When sampling from a paving mixer it is not acceptable to place 3 small containers on the sub grade in order to obtain the required samples of concrete (T or F) - Answer ️️ -F TEMPERATURE - Answer ️️ - it may require up to ___ min before the temp stabilizes when the NMS of the coarse agg is greater than ___ - Answer ️️ -20min., 3in. The container for the concrete shall be large enough to provide at least ___ inches, or _____ of coarse agg, of concrete in all directions around the TMD - Answer ️️ -3in., 3 x NMS The temperature measuring device shall have the capability of measuring the temperature of the freshly mixed concrete to ± ______ oF accuracy and have a range of ______ to ______ oF. - Answer ️️ -1,30to120