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