ACI Test 100% Correctly Solved 2024

ACI Test 100% Correctly Solved 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 A composite sample of concrete is not required even if the only purpose for obtaining the sample is to determine temperature. T or F - Answer- T The Temperature Measuring Device used for determining concrete temperature must be calibrated ______ or whenever there is a question of accuracy. - Answer- annually The temperature of freshly mixed concrete can be measured in - Answer- all of the above Submerge the sensing portion of the thermometer at least ______ inches into the concrete - Answer- 3 Gently press concrete around the thermometer such that the_______ does not affect the reading. - Answer- ambient air temp