ACI GRADE 1 WRITTEN EXAM LATEST ACTUAL EXAM
The sensor of the temperature measureing device shall be submerged a minimum of
____ in - ANSWER: 3 (75mm)
The temperature measureing device shall have a capacity of measuring temperature
of freshly mixed conrcrete to +-_____ degrees F throught a range of _____ -
ANSWER: 1(.5 degrees C), 30-120 (0-50 degrees C)
The temperature measuring device shall be calibrated____, or whenever there is a
question of _____ - ANSWER: annually, accuracy
The temp of concrete may be measured in a wheelbarrow - ANSWER: true
the temp of concrete may be measured in a wall form - ANSWER: true
A composite sample of concrete is required even if the only purpose for obtaining
the sample is to determine temp. - ANSWER: false
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 temp measuring device after the
device has submerged - ANSWER: Press concrete around measuring device
How long must the temp device remain in the concrete - ANSWER: at least 2 minutes
(but no more than 5)
After temp of concrete is read, what then is required - ANSWER: reporting of temp
the temp of concrete to be measured to the nearest ____degree F - ANSWER: 1 (.5
degree C)
According to the ASTM C1064 what is one reason to take the temp of concrete -
ANSWER: verify conformance to a specified requirement for temp
A max temp of concrete is specified in ASTM C1064 - ANSWER: False
The sample of concrete used for temp determination must be rodded 25 times -
ANSWER: False
Sampling by this method is required when tests are to be made to determine ____
with specification requirements - ANSWER: compliance
, The method covers sampling from four types of mixers which are _____, _____,
____, and _______ - ANSWER: stationary mixes, 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 - ANSWER: True
The maximum elapsed time allowed between obtaining the final portion of the
composite sample and beginning the tests for slump, temp, 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 test specimen is - ANSWER: 28 L (1ft^3)
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
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 -
ANSWER: 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 - ANSWER: 2
Concrete samples from a truck mixer must be obtained before any water or
admixtures are added to the mixer at the job site - ANSWER: False
The composite sample from a truck mixer must be obtained from the _____ portion
of the batch - ANSWER: Middle
When the concrete contains aggregate larger than permitted for a particular test
method, the sample fo concrete must be ______ ______ before making the test -
ANSWER: Wet Sieved
The slump test is applicable to plastic concrete with a max aggregate size of ____ in -
ANSWER: 1.5 in (37.5 mm)
The sensor of the temperature measureing device shall be submerged a minimum of
____ in - ANSWER: 3 (75mm)
The temperature measureing device shall have a capacity of measuring temperature
of freshly mixed conrcrete to +-_____ degrees F throught a range of _____ -
ANSWER: 1(.5 degrees C), 30-120 (0-50 degrees C)
The temperature measuring device shall be calibrated____, or whenever there is a
question of _____ - ANSWER: annually, accuracy
The temp of concrete may be measured in a wheelbarrow - ANSWER: true
the temp of concrete may be measured in a wall form - ANSWER: true
A composite sample of concrete is required even if the only purpose for obtaining
the sample is to determine temp. - ANSWER: false
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 temp measuring device after the
device has submerged - ANSWER: Press concrete around measuring device
How long must the temp device remain in the concrete - ANSWER: at least 2 minutes
(but no more than 5)
After temp of concrete is read, what then is required - ANSWER: reporting of temp
the temp of concrete to be measured to the nearest ____degree F - ANSWER: 1 (.5
degree C)
According to the ASTM C1064 what is one reason to take the temp of concrete -
ANSWER: verify conformance to a specified requirement for temp
A max temp of concrete is specified in ASTM C1064 - ANSWER: False
The sample of concrete used for temp determination must be rodded 25 times -
ANSWER: False
Sampling by this method is required when tests are to be made to determine ____
with specification requirements - ANSWER: compliance
, The method covers sampling from four types of mixers which are _____, _____,
____, and _______ - ANSWER: stationary mixes, 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 - ANSWER: True
The maximum elapsed time allowed between obtaining the final portion of the
composite sample and beginning the tests for slump, temp, 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 test specimen is - ANSWER: 28 L (1ft^3)
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
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 -
ANSWER: 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 - ANSWER: 2
Concrete samples from a truck mixer must be obtained before any water or
admixtures are added to the mixer at the job site - ANSWER: False
The composite sample from a truck mixer must be obtained from the _____ portion
of the batch - ANSWER: Middle
When the concrete contains aggregate larger than permitted for a particular test
method, the sample fo concrete must be ______ ______ before making the test -
ANSWER: Wet Sieved
The slump test is applicable to plastic concrete with a max aggregate size of ____ in -
ANSWER: 1.5 in (37.5 mm)
