ACI CONCRETE FIELD TESTING
TECHNICIAN- GRADE I EXAM
QUESTIONS AND ANSWERS 2026
VERIFIED.
The sensor of the temperature measuring device shall be submerged a minimum of _____ in.
[_____mm] into the freshly mixed concrete. - ANS 3 in. [75 mm]
The temperature measuring device shall have a capacity of measuring temperature of freshly
mixed concrete to +- _____ degrees F [+- _____ C] throughout a range of _____. - ANS 1
degree F [0.5 C], 30 degrees F to 120 F [0 C to 50 C]
The temperature measuring device shall be calibrated _____, or whenever there is a question of
_____. - ANS Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or False? - ANS True
The temperature of concrete may be measured in a wall form. True of False - ANS True
A composite sample of concrete is required even if the only purpose for obtaining the sample is
to determine temperature. True of False? - ANS False
What must be done to the sample container prior to sampling the concrete? - ANS Dampen
(with water)
, What must be done to the concrete surrounding the temperature measuring device after the
device is submerged in the fresh concrete. - ANS Gently press the concrete around the
temperature measuring device at the surface of the concrete
How long must the temperature measuring device remain in the freshly mixed concrete? -
ANS At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is required? - ANS Reporting of
temperature
The temperature of concrete is reported to the nearest _____ degrees F [_____ C] - ANS 1
degree F [0.5 C]
According to ASTM C1064, what is one reason to take the temperature of concrete? -
ANS Verify conformance to a specified requirement for temperature of concrete
A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True of False? -
ANS False
The sample of concrete used for temperature determination must be rodded 25 times. True or
False? - ANS False
Sampling by this method is required when tests are to be made to determine _____ with
specification requirements. - ANS Compliance
This method covers sampling from four types of mixtures which are _____, _____, _____, and
_____. - ANS Stationary mixers, paving mixers, revolving drum mixers, and open top mixers
The maximum allowable time between obtaining the first and final portions of a composite
sample is _____ minutes. - ANS 15
TECHNICIAN- GRADE I EXAM
QUESTIONS AND ANSWERS 2026
VERIFIED.
The sensor of the temperature measuring device shall be submerged a minimum of _____ in.
[_____mm] into the freshly mixed concrete. - ANS 3 in. [75 mm]
The temperature measuring device shall have a capacity of measuring temperature of freshly
mixed concrete to +- _____ degrees F [+- _____ C] throughout a range of _____. - ANS 1
degree F [0.5 C], 30 degrees F to 120 F [0 C to 50 C]
The temperature measuring device shall be calibrated _____, or whenever there is a question of
_____. - ANS Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or False? - ANS True
The temperature of concrete may be measured in a wall form. True of False - ANS True
A composite sample of concrete is required even if the only purpose for obtaining the sample is
to determine temperature. True of False? - ANS False
What must be done to the sample container prior to sampling the concrete? - ANS Dampen
(with water)
, What must be done to the concrete surrounding the temperature measuring device after the
device is submerged in the fresh concrete. - ANS Gently press the concrete around the
temperature measuring device at the surface of the concrete
How long must the temperature measuring device remain in the freshly mixed concrete? -
ANS At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is required? - ANS Reporting of
temperature
The temperature of concrete is reported to the nearest _____ degrees F [_____ C] - ANS 1
degree F [0.5 C]
According to ASTM C1064, what is one reason to take the temperature of concrete? -
ANS Verify conformance to a specified requirement for temperature of concrete
A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True of False? -
ANS False
The sample of concrete used for temperature determination must be rodded 25 times. True or
False? - ANS False
Sampling by this method is required when tests are to be made to determine _____ with
specification requirements. - ANS Compliance
This method covers sampling from four types of mixtures which are _____, _____, _____, and
_____. - ANS Stationary mixers, paving mixers, revolving drum mixers, and open top mixers
The maximum allowable time between obtaining the first and final portions of a composite
sample is _____ minutes. - ANS 15
