Aci Flatwork Exam All Possible Questions And Answers With Complete Solution

Measuring the gap under a 10-ft straightedge is one way of determining: {Ans: floor flatness}Changes in concrete temperatures affect: {Ans: setting time, air content, and slump}Floor flatness measurements taken more than 72 hours after concrete placement are the best measure of the finishers' skills. {Ans: False}Grooves are used primarily to: {Ans: cut grooves to a depth of 1/4 the slab thickness for contraction joints in exterior concrete}The primary function of welded wire reinforcement in slabs-on-ground that are considered unreinforced is: {Ans: keeping any slab cracks tightly closed}Power trowels can be used for floating or troweling {Ans: True}Highway straight edges are used in cutting and filling concrete surfaces at either _____ _______ or ______ degrees to the construction joint. {Ans: right angles or 45}Which one of the following placing sequences for casting slabs-on-ground is not recommended? {Ans: Checkerboard}If a concrete slab on ground won't be exposed to sulfates, the cement used is most likely to be: {Ans: Type I}Float blades for power troweling machines are wider than trowel blades and are turned up on the edges to prevent them from digging into the surface {Ans: True}In cold weather, the sub grade