ACI Concrete Exam Questions And Answers
Graded A+
ASTM C1064 is for what testing?
Standard Test Method For Temperature of Freshly Mixed Hydraulic-Cement Concre
The sensor of the temperature measuring device shall be submerged a minimum of ______ inches
into the freshly mixed concrete.
3" (in depth )
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, 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.
Compliance
ASTM C172 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 (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.
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
Graded A+
ASTM C1064 is for what testing?
Standard Test Method For Temperature of Freshly Mixed Hydraulic-Cement Concre
The sensor of the temperature measuring device shall be submerged a minimum of ______ inches
into the freshly mixed concrete.
3" (in depth )
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, 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.
Compliance
ASTM C172 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 (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.
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
