Concrete ACI Certification Exam (Complete And Verified Study material) (15pages) LEARNEXAMS

What must be done if the concrete drops below the top of the Slump mold while the top layer is being rodded? Add additional concrete to keep an excess of concrete above the top of the mold at all times Rod each layer ___ times uniformly over the cross section with the rounded end of the rod. 25 The slump mold is filled in _____ layers. 3 layers True or false the slump mold should be in a dry condition before beginning the test? False. For use in the slump test, the tamping end on both ends of the tamping rod must be... Rounded to a hemispherical tip True or false the Anterior surface of the slump mold is allowed to have minor irregularities? False The mold for making the slump test is in the shape of The frustum of a cone What is the maximum allowable time between obtaining the first and final portion of the composite samples? 15 minutes True or false the sample of concrete used for temperature determination must be rodded 25 time? False What is the required shape of the tamping end of the tamping rod? Rounded to a hemispherical tip