ACI Concrete Field-Testing Technician - Grade I | 100%
Correct Answers | Verified | Latest 2024 Version
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.
start molding specimens fr strength tests within __ after fabrication the composite sample. - ✔✔15 min.
The concrete sample must be protected from contamination and __. - ✔✔Rapid evaporation
The maximum size sample for making strength test specimens is __ ft cubed - ✔✔1 foot cubed.
Correct Answers | Verified | Latest 2024 Version
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.
start molding specimens fr strength tests within __ after fabrication the composite sample. - ✔✔15 min.
The concrete sample must be protected from contamination and __. - ✔✔Rapid evaporation
The maximum size sample for making strength test specimens is __ ft cubed - ✔✔1 foot cubed.
