ACI Concrete Field Tes ng Technician- Grade I Ques ons
and answers NEWEST RATED A+ 2025/2026 100%
VERIFIED CORRECT
The sensor of the temperature measuring device shall be submerged a minimum of _____ in.
[_____mm] into the freshly mixed concrete. - Correct Answers 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 _____. - Correct
Answers 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 ques*on
of _____. - Correct Answers Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or False? - Correct
Answers True
The temperature of concrete may be measured in a wall form. True of False - Correct Answers
True
A composite sample of concrete is required even if the only purpose for obtaining the sample is
to determine temperature. True of False? - Correct Answers False
What must be done to the sample container prior to sampling the concrete? - Correct Answers
Dampen (with water)
What must be done to the concrete surrounding the temperature measuring device a0er the
device is submerged in the fresh concrete. - Correct Answers 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? -
Correct Answers At least 2 minutes but not more than 5 minutes
A0er the temperature of the concrete is read, what is required? - Correct Answers Repor*ng
of temperature
The temperature of concrete is reported to the nearest _____ degrees F [_____ C] - Correct
Answers 1 degree F [0.5 C]
According to ASTM C1064, what is one reason to take the temperature of concrete? - Correct
Answers 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? -
Correct Answers False
The sample of concrete used for temperature determina*on must be rodded 25 *mes. True or
False? - Correct Answers False
Sampling by this method is required when tests are to be made to determine _____ with
specifica*on requirements. - Correct Answers Compliance
This method covers sampling from four types of mixtures which are _____, _____, _____, and
_____. - Correct Answers Sta*onary mixers, paving mixers, revolving drum mixers, and open
top mixers
The maximum allowable *me between obtaining the first and final por*ons of a composite
sample is _____ minutes. - Correct Answers 15
, Por*ons of a composite sample shall be thoroughly remixed bfore beginning tests on the
sample. True of False? - Correct Answers True
The maximum elapsed *me allowed between obtaining the final por*on of the composite
sample and beginning the tests for slump, temperature, and air content is _____ minutes. -
Correct Answers 5
The molding of strength test specimens shall begin within _____ minutes a0er fabrica*ng the
composite sample. - Correct Answers 15
The concrete sample must be protected from contamina*on and _____. - Correct Answers
Rapid evapora*on
The minimum size sample for making strength test specimens is _____. - Correct Answers 28 L
(10^3)
When sampling from a sta*onary mixer, the batch must be sampled at _____ or more regularly
spaced intervals during discharge of the middle por*on of the batch - Correct Answers 2
The composite sample for a paving mixer must represent a minimum of _____ different
por*ons of the batch of concrete taken from the pile a0er discharge. - Correct Answers 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 por*on of this batch. - Correct
Answers 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? - Correct Answers False
and answers NEWEST RATED A+ 2025/2026 100%
VERIFIED CORRECT
The sensor of the temperature measuring device shall be submerged a minimum of _____ in.
[_____mm] into the freshly mixed concrete. - Correct Answers 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 _____. - Correct
Answers 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 ques*on
of _____. - Correct Answers Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or False? - Correct
Answers True
The temperature of concrete may be measured in a wall form. True of False - Correct Answers
True
A composite sample of concrete is required even if the only purpose for obtaining the sample is
to determine temperature. True of False? - Correct Answers False
What must be done to the sample container prior to sampling the concrete? - Correct Answers
Dampen (with water)
What must be done to the concrete surrounding the temperature measuring device a0er the
device is submerged in the fresh concrete. - Correct Answers 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? -
Correct Answers At least 2 minutes but not more than 5 minutes
A0er the temperature of the concrete is read, what is required? - Correct Answers Repor*ng
of temperature
The temperature of concrete is reported to the nearest _____ degrees F [_____ C] - Correct
Answers 1 degree F [0.5 C]
According to ASTM C1064, what is one reason to take the temperature of concrete? - Correct
Answers 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? -
Correct Answers False
The sample of concrete used for temperature determina*on must be rodded 25 *mes. True or
False? - Correct Answers False
Sampling by this method is required when tests are to be made to determine _____ with
specifica*on requirements. - Correct Answers Compliance
This method covers sampling from four types of mixtures which are _____, _____, _____, and
_____. - Correct Answers Sta*onary mixers, paving mixers, revolving drum mixers, and open
top mixers
The maximum allowable *me between obtaining the first and final por*ons of a composite
sample is _____ minutes. - Correct Answers 15
, Por*ons of a composite sample shall be thoroughly remixed bfore beginning tests on the
sample. True of False? - Correct Answers True
The maximum elapsed *me allowed between obtaining the final por*on of the composite
sample and beginning the tests for slump, temperature, and air content is _____ minutes. -
Correct Answers 5
The molding of strength test specimens shall begin within _____ minutes a0er fabrica*ng the
composite sample. - Correct Answers 15
The concrete sample must be protected from contamina*on and _____. - Correct Answers
Rapid evapora*on
The minimum size sample for making strength test specimens is _____. - Correct Answers 28 L
(10^3)
When sampling from a sta*onary mixer, the batch must be sampled at _____ or more regularly
spaced intervals during discharge of the middle por*on of the batch - Correct Answers 2
The composite sample for a paving mixer must represent a minimum of _____ different
por*ons of the batch of concrete taken from the pile a0er discharge. - Correct Answers 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 por*on of this batch. - Correct
Answers 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? - Correct Answers False
