ACI Grade 1 Written Exam Questions with correct Answers | Latest Updated 2024

ACI Grade 1 Written Exam Questions with correct Answers | Latest Updated 2024 The temp. measuring device shall be capable of accurately measuring the temp. of freshly mixed concrete to ____ throughout a range of ____. - Answer ️️ -1 Degree F, 30-120 Degrees F A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine the temp. T or F? - Answer ️️ -False C172/C172M covers sampling from five type of equipment which are___, ___, ___, ___, & ____? - Answer ️️ -revolving drum, stationary, paving, continuous, & open top The mold for making the slump test is in the shape of ____. - Answer ️️ -the frustum of a cone The surface on which the slump mold will be placed must be ____. - Answer ️️ -Flat, moist non-absorbent, & rigid How deep should the tamping rod penetrate each layer? - Answer ️️ -Rod each layer throughout it's depth , on second & final layer the rod should penetrate into the previous layer approximately 1 in. Prior to lifting the mold, concrete must be removed from ____. - Answer ️️ -the area surrounding the base of the mold What is the minimum frequency of the vibrator used in Test Method C138/C138M - Answer ️️ -9000 Vibrations/Min., 150 Hertz What is the minimum thickness of a metal strike-off plate used in Test Method C138/C138M? - Answer ️️ -1/4 in. What is the minimum thickness of a glass/acrylic strike-off plate used in Test Method C138/C138M? - Answer ️️ -1/2 in. Measures other than air meter bowls used for Test Method C138/C138M must conform to Test Method ___. - Answer ️️ -C29/C29M Air meter bowls used for Test Method C138/C138M must conform to Test Method ___ and be calibrated for volume according to Test Method ___. - Answer ️️ -C231, C29 The pressure method of determining air content can be used on concrete containing ___ ____ aggregate. - Answer ️️ -relatively dense