ACI Certification Exam Questions With Correct Answers Latest Updated 2024/2025 | Scored A+

The Method of determining air content of concrete containing lightweight aggregate is the pressure method. True or False? Answer - False When making a test cylinder from concrete being used in construction, the field technician must also measure the slump of the concrete. True or False? Answer - True While the technician is checking the slump of the concrete, there is a decided falling away or shearing off of concrete from one side of the sample. What should the technician do? Answer - Disregard the test and retest on another portion of the sample Preparation of specimens for transport includes Answer - Determining that at least 8 hours has elapsed since the final set If the aggregate correction factor for a given source of fine and coarse aggregate is found to be .2% in a pressure air meter, and an air content value of 5.0% is read on the gage of the same air meter containing concrete with the same aggregate, what is the correct air content in %. Answer - 4.8% = 5.0 - 0.2 Strength test specimens transported from the field to the testing laboratory must be Answer - Protected from jarring, moisture loss, and freezing. Test for slump and air content must be started within __ after obtaining the final portion of the composite sample. Answer - 5 mins The minimum size for samples to be used for strength tests is __. Answer - 1 ft^3 = 28 L After strike off of the measure used to determine density, a small quantity of concrete may be added to correct a deficiency. True or False? Answer - False ACI Certification Exam Questions With Correct Answers Latest Updated 2024/2025 | Scored A+ For normal strength concretes, what temperature range must be maintained for test cylinders during initial curing? Answer - 60-80 deg F