ACI Concrete Field Testing Technician- Grade
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I Exam with accurate detailed solutions
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The sensor of the temperature measuring device shall be submerged a
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minimum of _____ in. [_____mm] into the freshly mixed concrete. - correct
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answer✔✔3 in. [75 mm] |!| |!| |!|
The temperature measuring device shall have a capacity of measuring
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temperature of freshly mixed concrete to +- _____ degrees F [+- _____ C] |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
throughout a range of _____. - correct answer✔✔1 degree F [0.5 C], 30
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degrees F to 120 F [0 C to 50 C] |!| |!| |!| |!| |!| |!| |!| |!| |!|
The temperature measuring device shall be calibrated _____, or whenever
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there is a question of _____. - correct answer✔✔Annually, accuracy
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The temperature of concrete may be measured in a wheelbarrow. True or
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False? - correct answer✔✔True |!| |!| |!|
The temperature of concrete may be measured in a wall form. True of
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False - correct answer✔✔True
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A composite sample of concrete is required even if the only purpose for
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obtaining the sample is to determine temperature. True of False? - correct
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answer✔✔False
What must be done to the sample container prior to sampling the
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concrete? - correct answer✔✔Dampen (with water) |!| |!| |!| |!| |!|
,What must be done to the concrete surrounding the temperature
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measuring device after the device is submerged in the fresh concrete. -
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correct answer✔✔Gently press the concrete around the temperature
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measuring device at the surface of the concrete |!| |!| |!| |!| |!| |!| |!|
How long must the temperature measuring device remain in the freshly
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mixed concrete? - correct answer✔✔At least 2 minutes but not more than
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5 minutes
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After the temperature of the concrete is read, what is required? - correct
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answer✔✔Reporting of temperature |!| |!|
The temperature of concrete is reported to the nearest _____ degrees F
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[_____ C] - correct answer✔✔1 degree F [0.5 C]
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According to ASTM C1064, what is one reason to take the temperature of
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concrete? - correct answer✔✔Verify conformance to a specified
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requirement for temperature of concrete |!| |!| |!| |!|
A maximum temperature of freshly mixed concrete is specified in ASTM
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C1064. True of False? - correct answer✔✔False
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The sample of concrete used for temperature determination must be
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rodded 25 times. True or False? - correct answer✔✔False
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Sampling by this method is required when tests are to be made to
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determine _____ with specification requirements. - correct
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answer✔✔Compliance
This method covers sampling from four types of mixtures which are _____,
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_____, _____, and _____. - correct answer✔✔Stationary mixers, paving
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mixers, revolving drum mixers, and open top mixers
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, The maximum allowable time between obtaining the first and final portions
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of a composite sample is _____ minutes. - correct answer✔✔15
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Portions of a composite sample shall be thoroughly remixed bfore
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beginning tests on the sample. True of False? - correct answer✔✔True
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The maximum elapsed time allowed between obtaining the final portion of
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the composite sample and beginning the tests for slump, temperature, and
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air content is _____ minutes. - correct answer✔✔5
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The molding of strength test specimens shall begin within _____ minutes
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after fabricating the composite sample. - correct answer✔✔15
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The concrete sample must be protected from contamination and _____. -
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correct answer✔✔Rapid evaporation |!| |!|
The minimum size sample for making strength test specimens is _____. -
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correct answer✔✔28 L (1ft^3) |!| |!| |!|
When sampling from a stationary mixer, the batch must be sampled at
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_____ or more regularly spaced intervals during discharge of the middle
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portion of the batch - correct answer✔✔2
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The composite sample for a paving mixer must represent a minimum of
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_____ different portions of the batch of concrete taken from the pile after
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discharge. - correct answer✔✔5 |!| |!| |!|
When sampling from a revolving drum truck mixer, concrete must be
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sampled at a minimum of _____ regularly spaced intervals during discharge
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of the middle portion of this batch. - correct answer✔✔2
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I Exam with accurate detailed solutions
|!| |!| |!| |!| |!| |!|
The sensor of the temperature measuring device shall be submerged a
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
minimum of _____ in. [_____mm] into the freshly mixed concrete. - correct
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
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 _____. - correct 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 _____. - correct answer✔✔Annually, accuracy
|!| |!| |!| |!| |!| |!| |!| |!| |!|
The temperature of concrete may be measured in a wheelbarrow. True or
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
False? - correct answer✔✔True |!| |!| |!|
The temperature of concrete may be measured in a wall form. True of
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
False - correct 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? - correct
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
answer✔✔False
What must be done to the sample container prior to sampling the
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
concrete? - correct 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. -
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
correct 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? - correct answer✔✔At least 2 minutes but not more than
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
5 minutes
|!|
After the temperature of the concrete is read, what is required? - correct
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
answer✔✔Reporting of temperature |!| |!|
The temperature of concrete is reported to the nearest _____ degrees F
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
[_____ C] - correct answer✔✔1 degree F [0.5 C]
|!| |!| |!| |!| |!| |!| |!| |!|
According to ASTM C1064, what is one reason to take the temperature of
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
concrete? - correct 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? - correct answer✔✔False
|!| |!| |!| |!| |!| |!|
The sample of concrete used for temperature determination must be
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
rodded 25 times. True or False? - correct answer✔✔False
|!| |!| |!| |!| |!| |!| |!| |!|
Sampling by this method is required when tests are to be made to
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
determine _____ with specification requirements. - correct
|!| |!| |!| |!| |!| |!| |!|
answer✔✔Compliance
This method covers sampling from four types of mixtures which are _____,
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
_____, _____, and _____. - correct 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. - correct answer✔✔15
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
Portions of a composite sample shall be thoroughly remixed bfore
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
beginning tests on the sample. True of False? - correct 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. - correct answer✔✔5
|!| |!| |!| |!| |!| |!| |!| |!|
The molding of strength test specimens shall begin within _____ minutes
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
after fabricating the composite sample. - correct answer✔✔15
|!| |!| |!| |!| |!| |!| |!|
The concrete sample must be protected from contamination and _____. -
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
correct answer✔✔Rapid evaporation |!| |!|
The minimum size sample for making strength test specimens is _____. -
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
correct 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 - correct 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. - correct 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. - correct answer✔✔2
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
