ACI Certification Practice Exam with 100% correct Answers | Verified & Updated 2024

ACI Certification Practice Exam with 100% correct Answers | Verified & Updated 2024 For 4x8 cylinders, how many layers and rod strokes to properly consolidate the concrete? - Answer ️️ -2 layers, 25 strokes For 6x12 cylinders, how many layers and rod strokes to properly consolidate the concrete? - Answer ️️ -3 layers, 25 rod strokes After rodding each layer, the sides of the molds should be tapped 10-15 times with a tapping rod? T/F - Answer ️️ -False It should be done with a rubber mallet When rodding the second and/or third layers, the rod must go through the current ;layer and penetrate the previous layer approximately 1" - Answer ️️ -True While rodding the top layer and the concrete becomes low, additional concrete must be added before the 25th stroke - Answer ️️ -True A tamping rod, flow, or trowel can be used to produce a smooth flat level surface on top of the cylinders - Answer ️️ -Tamping rod, flow, trowel, all the above All of the above is correct When a strength specimen is used for acceptance testing, quality control testing, or trial batching a mix design, which type of curing method should be used - Answer ️️ -Standard lab cure when a strength specimen is used to determine when a structure can be put in the service or when shoring can be removed, which type of curing should be used? - Answer ️️ -Field cure Which three tests must always be performed when making test specimens? - Answer ️️ - Temperature, slump, air content Concrete should cover________ inches around the temperature sensor? - Answer ️️ -3 When inserting the sensor into the sample, gently press concrete around the sensor. - Answer ️️ -True