ACI Certification- exam 2024
with 100% correct answers
ASTM C1064 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"
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
ASTM C172 Answer✔✔ - Standard Practice for Sampling Freshly Mixed Concrete
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 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
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
with 100% correct answers
ASTM C1064 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"
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
ASTM C172 Answer✔✔ - Standard Practice for Sampling Freshly Mixed Concrete
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 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
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
