ACI Concrete Field Testing Technician -
Grade I
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.
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
The temp. measuring device shall be verified __, or whenever there is a question of __. - Answer-
Annually / accuracy
The temp of concrete may be measured in a wheelbarrow? T/F - Answer-True
The temp. of concrete may be measured in a wall form. T/F - Answer-True
A composite sample of concrete is required even if the only purpose for obtaining the sample is to
determine temp. T/F - Answer-False
, What must be done to the sample container prior to sampling the concrete - Answer-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? - Answer-Gently press the concrete at the surface around the
measuring device.
How long must the temperature measuring device remain in the freshly mixed concrete? - Answer-At
least 2 min., no longer than 5 min.
After the temperature of the concrete is read, what is then required? - Answer-Reporting of temp.
The temp. of concrete is reported to the nearest __. - Answer-1 degree F
According to ASTM C1064, what is one reason to take the temperature of concrete? - Answer-to verify
conformance to a specific requirement.
A max. temp. of freshly mixed concrete is specified in ASTM C1064. T/F - Answer-False
The sample of concrete used for temperature determination must be rodded 25 times. - Answer-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. - Answer-Compliance
This method covers sampling from four types of mixers, which are __, __, __, and __. - Answer-
Stationary mixers / Paving mixers / revolving drum mixers / open top mixers
Grade I
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.
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
The temp. measuring device shall be verified __, or whenever there is a question of __. - Answer-
Annually / accuracy
The temp of concrete may be measured in a wheelbarrow? T/F - Answer-True
The temp. of concrete may be measured in a wall form. T/F - Answer-True
A composite sample of concrete is required even if the only purpose for obtaining the sample is to
determine temp. T/F - Answer-False
, What must be done to the sample container prior to sampling the concrete - Answer-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? - Answer-Gently press the concrete at the surface around the
measuring device.
How long must the temperature measuring device remain in the freshly mixed concrete? - Answer-At
least 2 min., no longer than 5 min.
After the temperature of the concrete is read, what is then required? - Answer-Reporting of temp.
The temp. of concrete is reported to the nearest __. - Answer-1 degree F
According to ASTM C1064, what is one reason to take the temperature of concrete? - Answer-to verify
conformance to a specific requirement.
A max. temp. of freshly mixed concrete is specified in ASTM C1064. T/F - Answer-False
The sample of concrete used for temperature determination must be rodded 25 times. - Answer-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. - Answer-Compliance
This method covers sampling from four types of mixers, which are __, __, __, and __. - Answer-
Stationary mixers / Paving mixers / revolving drum mixers / open top mixers
