ACI Concrete Field Testing Technician –
Grade 1 Certification Exam for the
2026/2027 cycle, featuring complete exam-
style questions with accurate, up-to-date
answers.
The sensor of the temperature measuring device shall
be submerged a minimum of _____ in. [_____mm] into
the freshly mixed concrete.
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 _____.
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 _____.
Annually, accuracy
The temperature of concrete may be measured in a
wheelbarrow. True or False?
True
The temperature of concrete may be measured in a
wall form. True of False
True
A composite sample of concrete is required even if
the only purpose for obtaining the sample is to
determine temperature. True of False?
,False
What must be done to the sample container prior to
sampling the concrete?
Dampen (with water)
What must be done to the concrete surrounding the
temperature measuring device after the device is
submerged in the fresh concrete.
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?
At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is
required?
Reporting of temperature
The temperature of concrete is reported to the nearest
_____ degrees F [_____ C]
1 degree F [0.5 C]
According to ASTM C1064, what is one reason to take
the temperature of concrete?
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?
False
The sample of concrete used for temperature
determination must be rodded 25 times. True or
False?
False
, Sampling by this method is required when tests are to
be made to determine _____ with specification
requirements.
Compliance
This method covers sampling from four types of
mixtures which are _____, _____, _____, and _____.
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.
15
Portions of a composite sample shall be thoroughly
remixed bfore beginning tests on the sample. True of
False?
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.
5
The molding of strength test specimens shall begin
within _____ minutes after fabricating the composite
sample.
15
The concrete sample must be protected from
contamination and _____.
Rapid evaporation
The minimum size sample for making strength test
specimens is _____.
28 L (1ft^3)
Grade 1 Certification Exam for the
2026/2027 cycle, featuring complete exam-
style questions with accurate, up-to-date
answers.
The sensor of the temperature measuring device shall
be submerged a minimum of _____ in. [_____mm] into
the freshly mixed concrete.
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 _____.
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 _____.
Annually, accuracy
The temperature of concrete may be measured in a
wheelbarrow. True or False?
True
The temperature of concrete may be measured in a
wall form. True of False
True
A composite sample of concrete is required even if
the only purpose for obtaining the sample is to
determine temperature. True of False?
,False
What must be done to the sample container prior to
sampling the concrete?
Dampen (with water)
What must be done to the concrete surrounding the
temperature measuring device after the device is
submerged in the fresh concrete.
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?
At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is
required?
Reporting of temperature
The temperature of concrete is reported to the nearest
_____ degrees F [_____ C]
1 degree F [0.5 C]
According to ASTM C1064, what is one reason to take
the temperature of concrete?
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?
False
The sample of concrete used for temperature
determination must be rodded 25 times. True or
False?
False
, Sampling by this method is required when tests are to
be made to determine _____ with specification
requirements.
Compliance
This method covers sampling from four types of
mixtures which are _____, _____, _____, and _____.
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.
15
Portions of a composite sample shall be thoroughly
remixed bfore beginning tests on the sample. True of
False?
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.
5
The molding of strength test specimens shall begin
within _____ minutes after fabricating the composite
sample.
15
The concrete sample must be protected from
contamination and _____.
Rapid evaporation
The minimum size sample for making strength test
specimens is _____.
28 L (1ft^3)
