ACI Grade 1 Written Exam Questions & 100% Verified Answers | Latest Update | Already Graded A+

The temp. measuring device shall be capable of accurately measuring the temp. of freshly mixed concrete to ____ throughout a range of ____. : 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? : False C172/C172M covers sampling from five type of equipment which are___, ___, ___, ___, & ____? : revolving drum, stationary, paving, continuous, & open top The mold for making the slump test is in the shape of ____. : the frustum of a cone The surface on which the slump mold will be placed must be ____. : Flat, moist non-absorbent, & rigid 2 | P a g e How deep should the tamping rod penetrate each layer? : 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 ____. : the area surrounding the base of the mold What is the minimum frequency of the vibrator used in Test Method C138/C138M : 9000 Vibrations/Min., 150 Hertz What is the minimum thickness of a metal strike-off plate used in Test Method C138/C138M? : 1/4 in.