ACI Concrete Practice Exam Questions and Answers | Verified & Updated 2024 | 100% Correct

ACI Concrete Practice Exam Questions and Answers | Verified & Updated 2024 | 100% Correct The end of the temperature sensing portion of the temperature measuring device is submerged a minimum of _____ into the freshly mixed concrete - Answer ️️ -3 The temperature measuring device shall be capable of measuring the temperature of freshly mixed concrete from ___ to ___ degrees - Answer ️️ -30, 120 The temperature measuring device should be verified ____ or whenever there is a question of ___ - Answer ️️ -annually, accuracy The temp of concrete can be measured in wheelbarrow - Answer ️️ -True The temperature of the concrete can be measured in a wall form - Answer ️️ -True A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temperature - Answer ️️ -True What must be done to the sample container prior to sampling concrete - Answer ️️ -Wet the container what must be done to the concrete surrounding the temperature measuring device after the device is submerged in concrete. - Answer ️️ -Close the voids surrounding device After temp is taken what must be done after - Answer ️️ -Record temp The temp is recorded to the nearest - Answer ️️ -1 F How long must the temperature measuring device remain in the freshly mixed concrete? - Answer ️️ -2-5 min According to Test Method C1064/C1064M, what is one reason to take the temperature of concrete? - Answer ️️ -Verify conformance to spec A maximum temperature of freshly mixed concrete is specified in Test Method C1064/C1064M, True or False - Answer ️️ -False The sample of concrete used for temp determination must be rodded 25 times, true or false - Answer ️️ -False Sampling by this practice covers procedures for obtaining representative samples, on which tests are to be performed to determine ___ with quality requirements of the specifications under which the concrete is furnished. - Answer ️️ -Compliance This practice covers sampling from five types of equipment, which are ___________, ___________, __________, __________, and __________. - Answer ️️ -Stationary, Paving, Revolving Drum, Continuous, Open Top The elapsed time between obtaining the first and final portions of a composite sample shall not exceed _____ minutes. - Answer ️️ -15 Portions of a composite sample shall be throughly remixed before beginning tests on the sample - Answer ️️ -True Start the tests for slump, temperature, and air content within how many minutes after obtaining the final portion of the composite sample? - Answer ️️ -5 Start molding specimens for strength tests within how many minutes after fabricating the composite sample? - Answer ️️ -15 The concrete sample must be protected from - Answer ️️ -Sun, Wind, Rapid Evaporation and Contamination The minimum size sample for making strength test specimens are - Answer ️️ -1 cubic foot When sampling from a stationary mixer, the batch must be sampled at _____ or more regularly spaced intervals during discharge of the middle portion of the batch - Answer ️️ -2 When sampling from a revolving drum truck mixer, concrete must be sampled at a minimum of _____ regularly spaced intervals during discharge of the middle portion of this batch. - Answer ️️ -2 When sampling from a paving mixer, obtain samples from atleast ___ different portions of the pile and combine them into one composite sample for test purposes. - Answer ️️ -5 Concrete samples from a truck mixer must be obtained before any water or admixtures are added to the mixer at the job site. True or False? - Answer ️️ -False The composite sample from a truck mixer must be obtained from the ____ portion of the batch. - Answer ️️ -Middle When the concrete contains aggregate larger than that permitted for a particular test method, the sample of concrete must be _____ _____ before making the test. - Answer ️️ -Wet Sieved What must occur before a sample of concrete can be taken from a revolving drum mixer - Answer ️️ -All water and admixtures must