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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 EXCELLENCE 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 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) ☑: F TEMPERATURE ☑: