ACI Certification - Concrete Field Testing Technician - Grade 1 - Test Sample Written Exam Questions - CP-1(17) with Answers

The 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 concrete from one side of the sample. What should the technician do? Correct Answer Disregard the test and retest on another portion of the sample Preparation of specimens for transport includes Correct 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 %. Correct Answer 4.8% = 5.0 - 0.2 Strength test specimens transported from the field to the testing laboratory must be Correct 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. Correct Answer 5 mins