ACI Field Grade 1 Practice Test Questions And Answers

The temperature measuring device shall be cable of accurately measuring the temperature of freshly mixed concrete to 1°F throught a range of____________________________. - Answer-30 - 120°F It is acceptable to measure the temperature of freshly mixed concrete in the forms provided? - Answer-The sensor of the temperature measuring device has at least 3 in. of cover in all directions. Composite samples are required even if the only purpose for obtaining the sample is to determine temperature. - Answer-False The temperature measuring device is left in the freshly mixed concrete for at least _______________ but not more than 5 minutes. - Answer-2 minutes Test Method C1064/C1064M specifies a maximum temperature of freshly mixed concrete. - AnswerFalse The elapsed time between obtaining the first and final portions of a composite sample shall not exceed ____________________. - Answer-15 minutes Individual samples shall be combined and remixed with a shovel the minimum amount necessary to ensure uniformity. - Answer-True The following test must be started within 5 minutes after obtaining the final portion of the composite sample: - Answer-Slump, Temperature, Air Content The concrete sample must be protected from? - Answer-Contamination & Evaporation When strength specimens are to be made, the minimum sample size is __________________. - Answer-1.0 ft3 Portions of the composite should be taken from the _______________of the batch discharge. - Answer-MiddleA composite sample taken from a paving mixer consists of _______________ individual samples taken from different portions of the pile. - Answer-Five