ACI Concrete Test Exam Questions And Answers 100% Verified

ACI Concrete Test Exam Questions And Answers 100% Verified T/F: a liquid in glass thermometer that is certifiably accurate and traceable to the NIST is required to verify concrete thermometers - answerTrue T/F: The Thermometer must remain in concrete for a minimum of 3 minutes - answerFalse T/F: ASTM 1064 requires a composite sample - answerFalse A thermometer can be used to record temperature if b) Thermometer is new B) Verified within one year after there was question of accuracy c) Accurate within 1 degree Fahrenheit d) All of the above e) B and C only - answere) B and C only Place the thermometer in concrete a minimum of a) 1" b) 2" c) 3" d) 4" - answerc) 3" If aggregate concrete is less than 3" leave thermometer in concrete in test: a) 5 mins b) 10 mins c) Minimum of 2 mins d) maximum of 5 mins e) both c and d - answere) both c and d How should you press the concrete around the thermometer? - answerGently Record the temperature to the nearest ___ degree - answer1 degree Temperature measuring device should be verified _____________ or whenever there is a question of___________. - answerAnnually; Accuracy What must occur before a sample of concrete can be taken from a revolving drum mixer? - answerAll water and admixtures must be added to the mixer When sampling from a stationary of revolving drum mixer,, what is collected and when is it taken during discharge? - answerTwo or more portions of concrete; at regularly spaced intervals; from the middle of the batch When sampling from a stationary or revolving drum mixer sample portions are obtained by a) repeatedly passing a receptacle through the center of a discharge stream b) completely diverting the discharge steam into sample container c) Repeatedly passing a receptacle through the entire discharge stream d) both a & b e) Both b & c - answer- e) Both b & c Describe the procedure for collecting a sample from a paving mixer - answerDischarge the contents of the paving mixer; obtain samples from at least five different portions of the pile What is the minimum size for a sample when strength test specimens are molded - answer1 cubic foot What action is required after the individual concrete samples have been transported to the place where tests are to be preformed? - answerCombine and remix the samples with a shovel What should be done if the concrete contains an aggregate larger than is appropriate for the size of the molds or equipment being used - answerWet Sieving Start the test for slump, temperature, and air content within how many minutes after obtaining the final portion of the composite sample - answer5 mins Start molding specimens for strength tests within how many minutes after fabricating the composite sample - answer15 mins From what must the concrete sample be protected - answerSun wind and rapid evaporation; contamination T/F: Remove the thermometer just