2025 ACI CERTIFICATION- CONCRETE FIELD TESTING
TECHNICIAN GRADE 1 CP-1 (12) QUESTIONS AND
ANSWERS COMPLETE EXAM GUIDE 2025
ASTM C1064 - CORRECT ANS✔✔ 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. - CORRECT ANS✔✔ 3"
The temperature measuring device shall have a capacity of measuring temperature of
freshly mixed concrete to ±_°F throughout a range of . - CORRECT ANS✔✔ 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? - CORRECT
ANS✔✔ True
The temperature of concrete may be measured in a wall form. True or False? - CORRECT
ANS✔✔ True
What must be done to the sample container prior to sampling the concrete? - CORRECT
ANS✔✔ 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 ANS✔✔ 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? -
CORRECT ANS✔✔ minimum of two minutes, maximum of five minutes
The temperature of the concrete is reported to the nearest °F - CORRECT ANS✔✔ 1
degree
A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True or False?
- CORRECT ANS✔✔ False
ASTM C172 - CORRECT ANS✔✔ Standard Practice for Sampling Freshly Mixed Concrete
Sampling by this method is required when tests are to be made to determine with
specification requirements. - CORRECT ANS✔✔ Compliance
This method covers sampling from four types of mixers, which are , , , and
. - CORRECT ANS✔✔ 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 ANS✔✔ 15
Portions of a composite sample shall be thoroughly remixed before beginning tests on the
sample. True or False? - CORRECT ANS✔✔ 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 ANS✔✔ 5
The molding of strength test specimens shall begin within minutes after fabricating the
composite
sample. - CORRECT ANS✔✔ 15
The concrete sample must be protected from contamination and . - CORRECT
ANS✔✔ Rapid evaporation
The minimum size sample for making strength test specimens is . - CORRECT ANS✔✔ 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. -
CORRECT ANS✔✔ 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
ANS✔✔ 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.
- CORRECT ANS✔✔ 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? - CORRECT ANS✔✔ False
The composite sample from a truck mixer must be obtained from the portion of the
batch. - CORRECT ANS✔✔ middle
TECHNICIAN GRADE 1 CP-1 (12) QUESTIONS AND
ANSWERS COMPLETE EXAM GUIDE 2025
ASTM C1064 - CORRECT ANS✔✔ 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. - CORRECT ANS✔✔ 3"
The temperature measuring device shall have a capacity of measuring temperature of
freshly mixed concrete to ±_°F throughout a range of . - CORRECT ANS✔✔ 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? - CORRECT
ANS✔✔ True
The temperature of concrete may be measured in a wall form. True or False? - CORRECT
ANS✔✔ True
What must be done to the sample container prior to sampling the concrete? - CORRECT
ANS✔✔ 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 ANS✔✔ 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? -
CORRECT ANS✔✔ minimum of two minutes, maximum of five minutes
The temperature of the concrete is reported to the nearest °F - CORRECT ANS✔✔ 1
degree
A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True or False?
- CORRECT ANS✔✔ False
ASTM C172 - CORRECT ANS✔✔ Standard Practice for Sampling Freshly Mixed Concrete
Sampling by this method is required when tests are to be made to determine with
specification requirements. - CORRECT ANS✔✔ Compliance
This method covers sampling from four types of mixers, which are , , , and
. - CORRECT ANS✔✔ 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 ANS✔✔ 15
Portions of a composite sample shall be thoroughly remixed before beginning tests on the
sample. True or False? - CORRECT ANS✔✔ 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 ANS✔✔ 5
The molding of strength test specimens shall begin within minutes after fabricating the
composite
sample. - CORRECT ANS✔✔ 15
The concrete sample must be protected from contamination and . - CORRECT
ANS✔✔ Rapid evaporation
The minimum size sample for making strength test specimens is . - CORRECT ANS✔✔ 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. -
CORRECT ANS✔✔ 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
ANS✔✔ 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.
- CORRECT ANS✔✔ 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? - CORRECT ANS✔✔ False
The composite sample from a truck mixer must be obtained from the portion of the
batch. - CORRECT ANS✔✔ middle
