ACI Test 84 Questions with Complete Solutions Graded A+!!

ACI Test 84 Questions with Complete Solutions Graded A+!! The total time allowed between obtaining the first and final portions of a composite sample is - Correct 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) - Correct Answer F Tests for slump, temperature, and air content must begin within ______ minutes after obtaining the composite sample - Correct Answer 5 minutes Begin molding test specimens within ______ minutes after obtaining the composite sample - Correct Answer 15 minutes The concrete samples should be protected from - Correct 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 - Correct Answer 28 L (1 ft^3) The primary objective of the sampling process is to obtain a representative sample (T or F) - Correct Answer T When sampling from a revolving drum truck mixer collect concrete from ______ portions of the batch - Correct Answer 2 or more Wet sieving is performed - Correct 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) - Correct Answer F TEMPERATURE - Correct Answer it may require up to ___ min before the temp stabilizes when the NMS of the coarse agg is greater than ___ - Correct 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 - Correct Answer 3in., 3 x NMS