ACI 84 Test Questions With Correct Answers

The total time allowed between obtaining the first and final portions of a composite sample is - ️️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) - ️️F Tests for slump, temperature, and air content must begin within ______ minutes after obtaining the composite sample - ️️5 minutes Begin molding test specimens within ______ minutes after obtaining the composite sample - ️️15 minutes The concrete samples should be protected from - ️️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 - ️️28 L (1 ft^3) The primary objective of the sampling process is to obtain a representative sample (T or F) - ️️T When sampling from a revolving drum truck mixer collect concrete from ______ portions of the batch - ️️2 or more Wet sieving is performed - ️️when the concrete contains aggregates larger than appropriate for a test