ACI Grade 1 - Written Test 2024 with Complete Solutions

ACI Grade 1 - Written Test 2024 with Complete Solutions 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 listed under which the concrete is furnished (C172/C172M-17 = Sampling Freshly Mixed Concrete) -Answer-Compliance This practice covers sampling from five types of equipment which are... (C172/C172M- 17 = Sampling Freshly Mixed Concrete) -Answer-Stationary, paving, revolving drum, continous, and open top mixers The elapsed time between obtaining the first and final portions of a composite sample shall not exceed... (C172/C172M-17 = Sampling Freshly Mixed Concrete) -Answer-15 mins T or F: Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample (C172/C172M-17 = Sampling Freshly Mixed Concrete) -Answer- True Start tests for slump, temperature, and air content within ___ after obtaining the final portion of the composite sample (C172/C172M-17 = Sampling Freshly Mixed Concrete) -Answer-5 Start molding specific ends for strength tests within ___ after fabricating the composite sample (C172/C172M-17 = Sampling Freshly Mixed Concrete) -Answer-15 The concrete sample must be protected from contamination and ... (C172/C172M-17 = Sampling Freshly Mixed Concrete) -Answer-Rapid evaporation (also sun and wind) The minimum size sample for making strength test specimens is ... (C172/C172M-17 = Sampling Freshly Mixed Concrete) -Answer-28 L (aka 1 ft3) 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 (C172/C172M-17 = Sampling Freshly Mixed Concrete) -Answer-2 When sampling from a paving mixer, obtain samples from at least ___ different portions of the pile and combine them into one composite sample for test purposes (C172/C172M-17 = Sampling Freshly Mixed Concrete) -Answer-5 When sampling from a revolving 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. (C172/C172M-17 = Sampling Freshly Mixed Concrete) -Answer-2 T or F: Concrete samples from a truck mixer must be obtained before any water or admixtures are added to the mixer at the job site. (C172/C172M-17 = Sampling Freshly Mixed Concrete) -Answer-F The composite sample from a truck mixer must be obtained from the ___ portion of the batch (C172/C172M-17 = Sampling Freshly Mixed Concrete) -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. (C172/C172M- 17 = Sampling Freshly Mixed Concrete) -Answer-Wet Sieved The end of the temperature sensing portion of the temperature measuring device is Submerged a minimum of ____ into the freshly mixed concrete (C1064/C1064M-17, Temperature of Freshly Mixed Hydraulic-cement concrete) -Answer-75 mm (3 in) The temperature measuring device shall be capable of accurately measuring the temperature of freshly mixed concrete to ____ throughout a range of ____. (C1064/C1064M-17, Temperature of Freshly Mixed Hydraulic-cement concrete) - Answer-+/- 0.5 C, 0 to 50 C (30 to 120 F) The temperature measuring device shall be verified ___, or whenever there is a question of ___. (C1064/C1064M-17, Temperature of Freshly Mixed Hydraulic-cement concrete) -Answer-Annually, accuracy T or F: The temperature of concrete may be measured in a wheelbarrow (C1064/C1064M-17, Temperature of Freshly Mixed Hydraulic-cement concrete) - Answer-True T or F: The temperature of concrete may be measured in a wall form. (C1064/C1064M- 17, Temperature of Freshly Mixed Hydraulic-cement concrete) -Answer-True T or F: A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temperature. (C1064/C1064M-17, Temperature of Freshly Mixed Hydraulic-cement concrete) -Answer-False What must be done to the sample containers prior to sampling the concrete? (C1064/C1064M-17, Temperature of Freshly Mixed Hydraulic-cement concrete) - Answer-Dampened (with water) What must be done to the concrete surrounding the temperature measuring after the device is submerged in the fresh concrete? (C1064/C1064M-17, Temperature o