ACI GRADE 1 study guide test with
latest updated revision questions
correctly answered
Collecting a representative sample of concrete to be tested, is as important as
executing the test methods to obtain_____ - ANS Accurate results
This practice covers sampling from four types of equipment, which are: - ANS
Stationary mixers, paving mixers, revolving truck mixers, continuous mixers
The elapsed time between obtaining the first and final portions of a composite
sample shall not exceed - ANS 15 minutes
Portions of a composite sample shall be thoroughly remixed before beginning test
on the sample, true or false - ANS True
Start test for slump, temperature and air content within ______ after obtaining the
final portion of the composite - ANS Five minutes
Start molding specimens for strength test within_____ after fabricating the
composite sample - ANS 15 minutes
The concrete sample must be protected from contamination and - ANS
evaporation
The minimum size sample for making strength test specimens is _____. - ANS 1
cubic foot or 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 - ANS two
When sampling from a paving mixer obtain samples from at least _____Different
portions of the pile and combine them into one composite sample for test
purposes - ANS Five
, When sampling from a revolving truck mixer, sample the concrete by collecting
___ or more portions, taken at regularly spaced intervals during discharge of the
middle portion of the batch - 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? - ANS False
When the concrete contains aggregates larger than that permitted for a particular
test method, the sample of concrete must be_____ before making the test - ANS
Wet screened
The stem of the thermometer is submerged a minimum of _____ into the freshly
mixed concrete. - ANS 3 inches
The thermometer shall be capable of accurately measuring the temperature
of freshly mixed concrete to _________ throughout a range of ______ - ANS 1 F,
30-120 F
The thermometer shall be verified within - ANS At least one year of its current
use
The temperature of concrete may be measured in a wheelbarrow, true or false -
ANS True
The temperature of concrete may be measured in a wall form true or false - ANS
True
A composite sample of concrete is required. Even if the only purpose for
obtaining, the sample is to determine temperature true or false. - ANS False
What must be done to the sample container prior to sampling the concrete? -
ANS Dampen (with water)
What must be done to the concrete surrounding the thermometer after the device
is submerged in the fresh concrete? - ANS Push concrete around the stem to
ensure the concrete is in full contact with the stem
For how long must the thermometer remain in the freshly mixed concrete? - ANS
2 to 5 minutes
latest updated revision questions
correctly answered
Collecting a representative sample of concrete to be tested, is as important as
executing the test methods to obtain_____ - ANS Accurate results
This practice covers sampling from four types of equipment, which are: - ANS
Stationary mixers, paving mixers, revolving truck mixers, continuous mixers
The elapsed time between obtaining the first and final portions of a composite
sample shall not exceed - ANS 15 minutes
Portions of a composite sample shall be thoroughly remixed before beginning test
on the sample, true or false - ANS True
Start test for slump, temperature and air content within ______ after obtaining the
final portion of the composite - ANS Five minutes
Start molding specimens for strength test within_____ after fabricating the
composite sample - ANS 15 minutes
The concrete sample must be protected from contamination and - ANS
evaporation
The minimum size sample for making strength test specimens is _____. - ANS 1
cubic foot or 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 - ANS two
When sampling from a paving mixer obtain samples from at least _____Different
portions of the pile and combine them into one composite sample for test
purposes - ANS Five
, When sampling from a revolving truck mixer, sample the concrete by collecting
___ or more portions, taken at regularly spaced intervals during discharge of the
middle portion of the batch - 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? - ANS False
When the concrete contains aggregates larger than that permitted for a particular
test method, the sample of concrete must be_____ before making the test - ANS
Wet screened
The stem of the thermometer is submerged a minimum of _____ into the freshly
mixed concrete. - ANS 3 inches
The thermometer shall be capable of accurately measuring the temperature
of freshly mixed concrete to _________ throughout a range of ______ - ANS 1 F,
30-120 F
The thermometer shall be verified within - ANS At least one year of its current
use
The temperature of concrete may be measured in a wheelbarrow, true or false -
ANS True
The temperature of concrete may be measured in a wall form true or false - ANS
True
A composite sample of concrete is required. Even if the only purpose for
obtaining, the sample is to determine temperature true or false. - ANS False
What must be done to the sample container prior to sampling the concrete? -
ANS Dampen (with water)
What must be done to the concrete surrounding the thermometer after the device
is submerged in the fresh concrete? - ANS Push concrete around the stem to
ensure the concrete is in full contact with the stem
For how long must the thermometer remain in the freshly mixed concrete? - ANS
2 to 5 minutes
