ACI Concrete Exam (2025)
Q&A
ASTM C1064 is for testing? - answer-Standard Test Method For Temperature of
Freshly Mixed Hydraulic-Cement Concrete
The sensor of the temperature measuring device shall be submerged a minimum of
______ inches into the freshly mixed concrete. - answer-3" (in depth )
The temperature measuring device shall have a capacity of measuring temperature of
freshly mixed concrete to ± ______ °F throughout a range of ____________. - answer-1
degree, 30 degrees to 120 degrees
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 or False? - answer-
True
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-Close off air voids by gently
pressing the concrete around the device
How long must the temperature measuring device remain in the freshly mixed concrete?
- answer-minimum of two minutes, maximum of five minutes
The temperature of the concrete is reported to the nearest ______ °F - answer-1 degree
, A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True or
False? - answer-False, The maximum temperature will be identified in the job
specifications.
Sampling by this method is required when tests are to be made to determine _____ with
specification requirements. - answer-Compliance
ASTM C172 covers sampling from four types of mixers, 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 before beginning tests on
the sample. True or 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-1
cubic foot (28 L)
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
Q&A
ASTM C1064 is for testing? - answer-Standard Test Method For Temperature of
Freshly Mixed Hydraulic-Cement Concrete
The sensor of the temperature measuring device shall be submerged a minimum of
______ inches into the freshly mixed concrete. - answer-3" (in depth )
The temperature measuring device shall have a capacity of measuring temperature of
freshly mixed concrete to ± ______ °F throughout a range of ____________. - answer-1
degree, 30 degrees to 120 degrees
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 or False? - answer-
True
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-Close off air voids by gently
pressing the concrete around the device
How long must the temperature measuring device remain in the freshly mixed concrete?
- answer-minimum of two minutes, maximum of five minutes
The temperature of the concrete is reported to the nearest ______ °F - answer-1 degree
, A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True or
False? - answer-False, The maximum temperature will be identified in the job
specifications.
Sampling by this method is required when tests are to be made to determine _____ with
specification requirements. - answer-Compliance
ASTM C172 covers sampling from four types of mixers, 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 before beginning tests on
the sample. True or 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-1
cubic foot (28 L)
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
