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