ACI Concrete Field Testing Technician - Grade I Questions and Answers 100% Pass

ACI Concrete Field Testing Technician - Grade I Questions and Answers 100% Pass The end of the temperature sensing portion of the temperature measuring device is submerged a minimum of __mm [__in.] into the freshly mixed concrete. 77mm /3in. The temperature measuring device shall be capable of accurately measuring the temperature of freshly mixed concrete to +- __C [+__F] throught a range of __. 0.5 C / +-1F / 0-50 Decrees C The temp. measuring device shall be verified __, or whenever there is a question of __. Annually / accuracy The temp of concrete may be measured in a wheelbarrow? T/F True The temp. of concrete may be measured in a wall form. T/F True A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temp. T/F False What must be done to the sample container prior to sampling the concrete It must be dampened with water What must be done to the concrete surrounding the temp measuring device after the device is submerged in the fresh concrete? Gently press the concrete at the surface around the measuring device. How long must the temperature measuring device remain in the freshly mixed concrete? At least 2 min., no longer than 5 min. After the temperature of the concrete is read, what is then required? Reporting of temp. The temp. of concrete is reported to the nearest __. 1 degree F According to ASTM C1064, what is one reason to take the temperature of concrete? to verify conformance to a specific requirement. A max. temp. of freshly mixed concrete is specified in ASTM C1064. T/F False The sample of concrete used for temperature determination must be rodded 25 times. False Sampling by this method covers procedures or obtaining representative samples, on which test are to be performed to determined __ with quality requirements of the specifications under which the concrete is furnished. Compliance This method covers sampling from four types of mixers, which are __, __, __, and __. Stationary mixers / Paving mixers / revolving drum mixers / open top mixers The elapsed time between obtaining the first and final portions of a composite sample shall not exceed __ min. 15 min. Portions of a composite sample shall be thoroughly mixed before beginning test on the sample. T/F True Start tests for slump, temp, and air content within __ min. after obtaining the final portion of the composite sample. 5 min.