ACI Certification- Concrete Field
Testing Technician Grade 1 CP-1
(12)19
ASTM C1064 - ANSWERS-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. - ANSWERS-3"
The temperature measuring device shall have a capacity of measuring temperature of freshly
mixed concrete to ± ______ °F throughout a range of ____________. - ANSWERS-1 degree, 30
degrees to 120 degrees
The temperature measuring device shall be calibrated ______ , or whenever there is a question
of ______ . - ANSWERS-Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or False? - ANSWERS-
True
The temperature of concrete may be measured in a wall form. True or False? - ANSWERS-True
What must be done to the sample container prior to sampling the concrete? - ANSWERS-
Dampen with water
What must be done to the concrete surrounding the temperature measuring device after the
device is submerged in the fresh concrete? - ANSWERS-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? -
ANSWERS-minimum of two minutes, maximum of five minutes
The temperature of the concrete is reported to the nearest ______ °F - ANSWERS-1 degree
A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True or False? -
ANSWERS-False
ASTM C172 - ANSWERS-Standard Practice for Sampling Freshly Mixed Concrete
Sampling by this method is required when tests are to be made to determine _____ with
specification requirements. - ANSWERS-Compliance
This method covers sampling from four types of mixers, which are _____ , _____ , _____ , and
_____ . - ANSWERS-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. - ANSWERS-15
Portions of a composite sample shall be thoroughly remixed before beginning tests on the
sample. True or False? - ANSWERS-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. -
ANSWERS-5
, The molding of strength test specimens shall begin within _____ minutes after fabricating the
composite
sample. - ANSWERS-15
The concrete sample must be protected from contamination and _____. - ANSWERS-Rapid
evaporation
The minimum size sample for making strength test specimens is _____. - ANSWERS-1 cubic foot
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. - ANSWERS-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. - 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 portion of the batch. -
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? - ANSWERS-False
The composite sample from a truck mixer must be obtained from the _____ portion of the
batch. - ANSWERS-middle
When the concrete contains aggregate larger than that permitted for a particular test method,
the sample of concrete must be _____ _____ before making the test. - ANSWERS-wet sieved
Testing Technician Grade 1 CP-1
(12)19
ASTM C1064 - ANSWERS-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. - ANSWERS-3"
The temperature measuring device shall have a capacity of measuring temperature of freshly
mixed concrete to ± ______ °F throughout a range of ____________. - ANSWERS-1 degree, 30
degrees to 120 degrees
The temperature measuring device shall be calibrated ______ , or whenever there is a question
of ______ . - ANSWERS-Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or False? - ANSWERS-
True
The temperature of concrete may be measured in a wall form. True or False? - ANSWERS-True
What must be done to the sample container prior to sampling the concrete? - ANSWERS-
Dampen with water
What must be done to the concrete surrounding the temperature measuring device after the
device is submerged in the fresh concrete? - ANSWERS-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? -
ANSWERS-minimum of two minutes, maximum of five minutes
The temperature of the concrete is reported to the nearest ______ °F - ANSWERS-1 degree
A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True or False? -
ANSWERS-False
ASTM C172 - ANSWERS-Standard Practice for Sampling Freshly Mixed Concrete
Sampling by this method is required when tests are to be made to determine _____ with
specification requirements. - ANSWERS-Compliance
This method covers sampling from four types of mixers, which are _____ , _____ , _____ , and
_____ . - ANSWERS-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. - ANSWERS-15
Portions of a composite sample shall be thoroughly remixed before beginning tests on the
sample. True or False? - ANSWERS-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. -
ANSWERS-5
, The molding of strength test specimens shall begin within _____ minutes after fabricating the
composite
sample. - ANSWERS-15
The concrete sample must be protected from contamination and _____. - ANSWERS-Rapid
evaporation
The minimum size sample for making strength test specimens is _____. - ANSWERS-1 cubic foot
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. - ANSWERS-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. - 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 portion of the batch. -
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? - ANSWERS-False
The composite sample from a truck mixer must be obtained from the _____ portion of the
batch. - ANSWERS-middle
When the concrete contains aggregate larger than that permitted for a particular test method,
the sample of concrete must be _____ _____ before making the test. - ANSWERS-wet sieved
