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ACI Concrete Field Testing Technician- Grade I
Exam Questions And Answers |Latest 2025 |
Guaranteed Pass.
The sensor of the temperature measuring device shall be submerged a minimum of _____ in.
[_____mm] into the freshly mixed concrete. - Answer✔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 _____. - Answer✔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 _____. - Answer✔Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or False? -
Answer✔True
The temperature of concrete may be measured in a wall form. True of False - Answer✔True
A composite sample of concrete is required even if the only purpose for obtaining the sample is
to determine temperature. True of False? - Answer✔False
What must be done to the sample container prior to sampling the concrete? -
Answer✔Dampen (with water)
What must be done to the concrete surrounding the temperature measuring device after the
device is submerged in the fresh concrete. - Answer✔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? -
Answer✔At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is required? - Answer✔Reporting of
temperature
The temperature of concrete is reported to the nearest _____ degrees F [_____ C] - Answer✔1
degree F [0.5 C]
1|Page
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 2:24PM.
According to ASTM C1064, what is one reason to take the temperature of concrete? -
Answer✔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? -
Answer✔False
The sample of concrete used for temperature determination must be rodded 25 times. True or
False? - Answer✔False
Sampling by this method is required when tests are to be made to determine _____ with
specification requirements. - Answer✔Compliance
This method covers sampling from four types of mixtures which are _____, _____, _____, and
_____. - Answer✔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. - Answer✔15
Portions of a composite sample shall be thoroughly remixed bfore beginning tests on the
sample. True of False? - Answer✔True
The maximum elapsed time allowed between obtaining the final portion of the composite
sample and beginning the tests for slump, temperature, and air content is _____ minutes. -
Answer✔5
The molding of strength test specimens shall begin within _____ minutes after fabricating the
composite sample. - Answer✔15
The concrete sample must be protected from contamination and _____. - Answer✔Rapid
evaporation
The minimum size sample for making strength test specimens is _____. - Answer✔28 L (1ft^3)
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
The composite sample for a paving mixer must represent a minimum of _____ different
portions of the batch of concrete taken from the pile after discharge. - Answer✔5
When sampling from a revolving drum truck mixer, concrete must be sampled at a minimum of
_____ regularly spaced intervals during discharge of the middle portion of this batch. -
Answer✔2
Concrete samples from a truck mixer must be obtained before any water or admixtures are
added to the mixer at the job site. True or False? - Answer✔False
The composite samples from a truck mixer must be obtained from the _____ portion of the
batch. - Answer✔Middle
2|Page
ACI Concrete Field Testing Technician- Grade I
Exam Questions And Answers |Latest 2025 |
Guaranteed Pass.
The sensor of the temperature measuring device shall be submerged a minimum of _____ in.
[_____mm] into the freshly mixed concrete. - Answer✔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 _____. - Answer✔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 _____. - Answer✔Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or False? -
Answer✔True
The temperature of concrete may be measured in a wall form. True of False - Answer✔True
A composite sample of concrete is required even if the only purpose for obtaining the sample is
to determine temperature. True of False? - Answer✔False
What must be done to the sample container prior to sampling the concrete? -
Answer✔Dampen (with water)
What must be done to the concrete surrounding the temperature measuring device after the
device is submerged in the fresh concrete. - Answer✔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? -
Answer✔At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is required? - Answer✔Reporting of
temperature
The temperature of concrete is reported to the nearest _____ degrees F [_____ C] - Answer✔1
degree F [0.5 C]
1|Page
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 2:24PM.
According to ASTM C1064, what is one reason to take the temperature of concrete? -
Answer✔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? -
Answer✔False
The sample of concrete used for temperature determination must be rodded 25 times. True or
False? - Answer✔False
Sampling by this method is required when tests are to be made to determine _____ with
specification requirements. - Answer✔Compliance
This method covers sampling from four types of mixtures which are _____, _____, _____, and
_____. - Answer✔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. - Answer✔15
Portions of a composite sample shall be thoroughly remixed bfore beginning tests on the
sample. True of False? - Answer✔True
The maximum elapsed time allowed between obtaining the final portion of the composite
sample and beginning the tests for slump, temperature, and air content is _____ minutes. -
Answer✔5
The molding of strength test specimens shall begin within _____ minutes after fabricating the
composite sample. - Answer✔15
The concrete sample must be protected from contamination and _____. - Answer✔Rapid
evaporation
The minimum size sample for making strength test specimens is _____. - Answer✔28 L (1ft^3)
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
The composite sample for a paving mixer must represent a minimum of _____ different
portions of the batch of concrete taken from the pile after discharge. - Answer✔5
When sampling from a revolving drum truck mixer, concrete must be sampled at a minimum of
_____ regularly spaced intervals during discharge of the middle portion of this batch. -
Answer✔2
Concrete samples from a truck mixer must be obtained before any water or admixtures are
added to the mixer at the job site. True or False? - Answer✔False
The composite samples from a truck mixer must be obtained from the _____ portion of the
batch. - Answer✔Middle
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