ACI Concrete Field-Testing Technician- Grade I
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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]
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
Questions With 100% Correct Answers Latest
Versions Top Rated
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]
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
