ACI Grade 1 - Written Test Questions & 100% Verified Answers | Latest Update | Already Graded A+

Sampling by this practice covers procedures for obtaining representative samples, on which tests are to be performed to determine ___ with quality requirements of the specifications listed under which the concrete is furnished (C172/C172M-17 = Sampling Freshly Mixed Concrete) : Compliance This practice covers sampling from five types of equipment which are... (C172/C172M17 = Sampling Freshly Mixed Concrete) : Stationary, paving, revolving drum, continous, and open top mixers The elapsed time between obtaining the first and final portions of a composite sample shall not exceed... (C172/C172M-17 = Sampling Freshly Mixed Concrete) : 15 mins T or F: Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample (C172/C172M-17 = Sampling Freshly Mixed Concrete) : True 2 | P a g e Start tests for slump, temperature, and air content within ___ after obtaining the final portion of the composite sample (C172/C172M-17 = Sampling Freshly Mixed Concrete) : 5 Start molding specific ends for strength tests within ___ after fabricating the composite sample (C172/C172M-17 = Sampling Freshly Mixed Concrete) : 15 The concrete sample must be protected from contamination and ... (C172/C172M-17 = Sampling Freshly Mixed Concrete) : Rapid evaporation (also sun and wind) The minimum size sample for making strength test specimens is ... (C172/C172M-17 = Sampling Freshly Mixed Concrete) : 28 L (aka 1 ft3) 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 (C172/C172M-17 = Sampling Freshly Mixed Concrete) : 2 3 | P a g e 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 (C172/C172M-17 = Sampling Freshly Mixed Concrete) : 5 When sampling from a revolving drum truck mixer, sample the concrete by collecting ___ or more portions take at regularly spaced intervals during discharge of the middle portion of the batch. (C172/C172M-17 = Sampling Freshly Mixed Concrete) : 2 T or F: Concrete samples from a truck mixer must be obtained before any water or admixtures are added to the mixer at the job site. (C172/C172M-17 = Sampling Freshly Mixed Concrete) :