Study Exam for ACI CertificationConcrete Field Testing Technician Grade 1 CP-1 (12) 2024 Updated

Study Exam for ACI CertificationConcrete Field Testing Technician Grade 1 CP-1 (12) 2024 Updated ASTM C1064 - CORRECT ANSWER-Standard Test Method For Temperature of Freshly Mixed Hydraulic-Cement Concrete The sensor of the temperature measuring device shall be submerged a minimum of ______ inches into the freshly mixed concrete. - CORRECT ANSWER-3" The temperature measuring device shall have a capacity of measuring temperature of freshly mixed concrete to ± ______ °F throughout a range of ____________. - CORRECT ANSWER-1 degree, 30 degrees to 120 degrees The temperature measuring device shall be calibrated ______ , or whenever there is a question of ______ . - CORRECT ANSWER-Annually, accuracy The temperature of concrete may be measured in a wheelbarrow. True or False? - CORRECT ANSWER-True The temperature of concrete may be measured in a wall form. True or False? - CORRECT ANSWER-True What must be done to the sample container prior to sampling the concrete? - CORRECT ANSWER-Dampen with water What must be done to the concrete surrounding the temperature measuring device after the device is submerged in the fresh concrete? - CORRECT ANSWER-Close off air voids by gently pressing the concrete around the device How long must the temperature measuring device remain in the freshly mixed concrete? - CORRECT ANSWER-minimum of two minutes, maximum of five minutes The temperature of the concrete is reported to the nearest ______ °F - CORRECT ANSWER-1 degree A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True or False? - CORRECT ANSWER-False ASTM C172 - CORRECT ANSWER-Standard Practice for Sampling Freshly Mixed Concrete Sampling by this method is required when tests are to be made to determine _____ with specification requirements. - CORRECT ANSWER-Compliance This method covers sampling from four types of mixers, which are _____ , _____ , _____ , and _____ . - CORRECT ANSWER-Stationary mixers, paving mixers, revolving drum mixers and open top mixers The maximum allowable time between obtaining the first and final portions of a composite sample is _____ minutes. - CORRECT ANSWER-15 Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample. True or False? - CORRECT ANSWER-True The maximum elapsed time allowed between obtaining the final portion of the composite sample and beginning the tests for slump, temperature, and air content is _____ minutes. - CORRECT ANSWER-5 The molding of strength test specimens shall begin within _____ minutes after fabricating the composite sample. - CORRECT ANSWER-15 The concrete sample must be protected from contamination and _____. - CORRECT ANSWER-Rapid evaporation The minimum size sample for making strength test specimens is _____. - CORRECT 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. - CORRECT ANSWER-2 The composite sample for a paving mixer must represent a minimum of _____ different portions of the batch of concrete taken from the pile after discharge.