ACI Certification: Sample Written Exam Questions with correct answers

False Answer The method of determining air content containing lightweight aggregate is the pressure method. True or False? True Answer 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? Disregard the test and retest on another portion of the sample. Answer While the technician is checking the slump of the concrete, there is a decided falling away or shearing off of the concrete from one side of the sample. What should the technician do? determination that at least 8 hours has elapsed since final set. Answer Preparation of specimens for transport includes: 4.8% Answer If the aggregate correction factor for a given source of fine and coarse aggregate is found to be 0.2% in a pressure air meter, and an air content value of 5.0% is read on the gauge of the same air meter containing concrete with the same aggregate, what is the correct air content? Protected from jarring, moisture loss, and freezing. Answer Strength test specimens transported from the field to the testing laboratory must be: 5 minutes Answer Tests for slump and air content must be started within [ ] after obtaining the final portion of the composite sample. 1 cubic foot Answer The minimum size for sampl