ACI Grade 1 Written Exam Practice Questions and Answers 100% Pass

ACI Grade 1 Written Exam Practice Questions and Answers 100% Pass 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. Copyright ©SOPHIABENNETT 2025 ACADEMIC YEARALL RIGHTS RESERVED. Page 2/7 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 The pressure method of determining air content cannot be used on concrete containing the following types of aggregate: ___, ___, & ___. - ANSWER-light weight, air- cooled blast furnace slag, & aggregate of high porosity What is the minimum allowable capacity of the measuring bowl used in Test Method C231/C231M? - ANSWER-6L (0.2ft^3) Copyright ©SOPHIABENNETT 2025 ACADEMIC YEARALL RIGHTS RESERVED. Page 3/7 What are the required characteristics of the tamping rod used in Test Method C231/C231M? - ANSWER-Round, straight steel rod, w/ a 16 mm (5/8 in) +-2 mm (1/16 in) diameter, length of at least 100 mm (4 in) greater than the depth of the measuring bowl, but not greater than 600 mm (24 in) in overall length w/ the tamping end rounded to a hemispherical tip of the same diameter as the rod What is the specified size of the mallet required for Test Method C231/C231M when the measuring bowl has a capacity of 14 L (0.5 ft^3) or less? - ANSWER-1 & 1/4 lbs +- 0.5 lbs The maximum size aggregate allowed for Test Method C231/C231M is ___. - ANSWER-2 in What tools maybe used to strike off the top surface of the concrete following consolidation of the final layer? - ANSWER-strike-off plate m