1
ACI CONCRETE FIELD TESTING TECHNICIAN EXAM
QUESTIONS AND ANSWERS LATEST UPDATED
2024/2025 | SCORED A+.
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
, 2
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
, 3
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
ACI CONCRETE FIELD TESTING TECHNICIAN EXAM
QUESTIONS AND ANSWERS LATEST UPDATED
2024/2025 | SCORED A+.
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
, 2
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
, 3
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
