ACI Concrete Testing Exam Questions and Answers | 100% Correct | 2024 Updated

ACI Concrete Testing Exam Questions and Answers | 100% Correct | 2024 Updated ASTM C31 - Answer ️️ -Making and curing concrete test specimens in the field ASTM C231 - Answer ️️ -Concrete Air Content Test - Pressure Method ASTM C173 - Answer ️️ -Concrete Air Content Test - Volume Method ASTM C172 - Answer ️️ -Sampling Fresh Concrete ASTM C143 - Answer ️️ -Standard Test Method for Slump of Hydraulic-Cement Concrete ASTM C138 - Answer ️️ -Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete ASTM C1064 - Answer ️️ -Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete 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 accurately measuring the temperature of freshly mixed concrete to ___ throughout a range of ____. - Answer ️️ -1 degree, 30 to 120 degrees The temperature measuring device shall be verified ___, or whenever there is a question of ____. - Answer ️️ -annually, accuracy The temperature of concrete may be measured in a wheelbarrow. - Answer ️️ -True The temperature of concrete may 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 the temperature. - Answer ️️ -False What must be done to the sample container prior to sampling the concrete? - Answer ️️ - dampen with water What must be done to the concrete surrounding the temperature measuring device after the device is submerged in concrete? - Answer ️️ -Tap the edges How long must the temperature measuring device remain in the freshly mixed concrete? - Answer ️️ -2 min, no more than 5 min After the temperature of concrete is read, what is required? - Answer ️️ -Reporting of the temperature The temperature of the concrete is reported to the nearest ___ - Answer ️️ -0.5 degree According to Test Method C1064/C1064M, what is one reason to take the temperature of concrete? - Answer ️️ -To confirm compliance A maximum temperature of freshly mixed concrete is specified in test method C1064/C1064M - Answer ️️ -False The sample of concrete used for temperature determination must be rodded 25 times. True or False? - Answer ️️ -False Sampling by C172 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 C172 covers sampling from five types of equipment, which are ___________, ___________, __________, __________, and __________. - Answer ️️ -Stationary mixers, paving mixers, revolving drum mixers, continuous mixers, open top mixers The elapsed time between obtaining the first and final portions of a composite sample shall not exceed ___. - Answer ️️ -15 min Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample. - Answer ️️ -True Start tests for slump, temperature, and air content within ___ after obtaining the final portion of the composite sample. - Answer ️️ -5 min Start molding specimens for strength tests within how many minutes after fabricating the composite sample? - Answer ️️ -15 min The concrete sample must be protected from contamination and - Answer ️️ -rapid evaporation The minimum size sample for making strength test specimens is - Answer ️️ -1 CF 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 drum truck mixer, sample the concrete by collecting ___ or more portions take at regularly spaced intervals during discharge of the middle portion of the batch - Answer ️️ -2