ACI Concrete field testing technician- grade 1 sample exam 2024/2025

ACI Concrete field testing technician- grade 1 sample examThe method of determining air content of concrete containing lightweight aggregate is the pressure method. True or False - correct 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 - correct answer True 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? A. Measure the slump directly over the center of the original base of the mold B. Measure the slump at the average distance above the original center C. Disregard the test and retest on another portion of the sample D. None of the above - correct answer C Preparation of specimens for transport includes: A. Determination that at least 8 hours has elapsed since final set B. Ensuring specimens have not been demolded C. Allowing the specimen to air dry for at least 4 hours - correct answer A 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 dead in the gage of the same air meter containing concrete with the same aggregate, what is the correct air content? A. 3.0% B. 5.2%