ACI FIELD GRADE 1 Correctly Answered Questions| UpToDate | Already Graded A+

Collecting a representative sample of concrete to be tested is as important as executing the test methods to obtain. ☑: Accurate Results This practice covers sampling from five types of equipment, which are ___________, ___________, __________, __________, and __________. ☑: stationary mixers, paving mixers, revolving truck mixers,continuous mixers. The elapsed time between obtaining the first and final portions of a composite sample shall not exceed. ☑: 15 minutes Portions of a composite sample shall be thoroughly remixed bfore beginning tests on the sample. True of False? ☑: True Start the tests for slump, temperature, and air content within how many minutes after obtaining the final portion of the composite sample? ☑: 5 Minutes EXCELLENCE 2 Start molding specimens for strength tests within how many minutes after fabricating the composite sample? ☑: 15 Minutes The concrete sample must be protected from contamination and _____. ☑: Rapid Evaporation The minimum size sample for making strength test specimens is. ☑: one cubic foot When sampling from a stationary mixer, the batch must be sampled at _____ or more regularly spaced intervals during discharge of the middle portion of the batch ☑: 2 when sampling from a paving mixer, obtain samples from at least _______ different portions of the pile and combine them into one composite sample for test purposes. ☑: 5 When sampling from a revolving drum truck mixer, concrete must be sampled at a minimum of _____ regularly spaced intervals during discharge of the middle portion of this batch. ☑: 2 EXCELLENCE 3 Concrete samples from a truck mixer must be obtained before any water or admixtures are added to the mixer at the job site. True or False? ☑: False When the concrete contains aggregate larger than allowed for the slump test, the large aggregate must be _____. ☑: wet seived