ACI Test exam 2024 with100% correct answers

The total time allowed between obtaining the first and final portions of a composite sample isAnswer - 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 sampleAnswer - 5 minutes Begin molding test specimens within ______ minutes after obtaining the composite sampleAnswer - 15 minutes The concrete samples should be protected fromAnswer - the sun, wind, and other sources of rapid evaporation, from contamination When test specimens are to be molded, the minimum size of sample obtained isAnswer - 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 batchAnswer - 2 or more Wet sieving is performedAnswer - when the concrete contains aggregates larger than appropriate for a test