ACI CONCRETE FIELD TESTING
TECHNICIAN- GRADE I 2026-2027 EXAM
| 250 QUESTIONS WITH VERIFIED
CORRECT ANSWERS
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 Answer 5
The molding of strength test specimens shall begin within
_____ minutes after fabricating the composite sample.
Correct Answer 15
The concrete sample must be protected from
contamination and _____. Correct Answer Rapid
evaporation
The minimum size sample for making strength test
specimens is _____. Correct 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 Correct
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. Correct
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 this batch. Correct 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. True or False? Correct Answer False
The composite samples from a truck mixer must be
obtained from the _____ portion of the batch. Correct
Answer Middle
When the concrete contains aggregate larger than that
permitted for a particular test method, the sample of
concrete must be _____ _____ before making the test.
Correct Answer Wet sieved
The slump test is applicable to plastic concrete with a
maximum size aggregate of _____. Correct Answer 1.5 in.
[37.5 mm]
When the concrete contains aggregate larger than allowed
for the slump test, the large aggregate must be _____.
Correct Answer Removed by wet sieving the sample over
1.5 in. [37.5 mm] sieve
,The mold for making the slump test is in the shape of
_____. Correct Answer The frustum of a cone
The height of the slump mold is _____. Correct Answer 12
in. [300 mm]
The interior surface of the slump mold is allowed to have
minor irregularities. True or False? Correct Answer False
For use in the slump test, the end or both ends of the
tamping rod must be _____. Correct Answer Rounded to a
hemispherical tip
The sample of concrete for use in making the slump test
must be obained in accordance with ASTM Standard
_____. Correct Answer C172, Standard Practice for
Sampling Freshly Mixed Concrete
The slump mold should be in a dry condition before
beginning the test. True or False? Correct Answer False
The surface on which the slump mold will be placed must
be _____. Correct Answer Flat, level, moist,
nonabsorbent, and free of vibration
The slump mold is filled in _____ layers. Correct Answer 3
Each layer should fill approximately _____ the volume of
the mold. Correct Answer One-third
, The approximate concrete depth (in verticle distance) after
placing the first layer is _____, and the second layer is
_____. Correct Answer 2 5/8 in. [70 mm], 6 1/8 in. [160
mm]
What is the specified number of roddings for each layer?
Correct Answer 25
How deep should the tamping rod penetrate into each
layer? Correct Answer Rod each layer throughout its
depth; on the second and final layers, the rod should
penetrate into the previous layer approximately 1 in. [25
mm]
When rodding the bottom layer, the tamping rod must be
_____ to uniformly distribute the strokes. Correct Answer
Slightly inclined
What must be done if the concrete drops below the top of
the slump mold while the top layer is being rodded?
Correct Answer Add additional concrete to keep an excess
of concrete above the top of the mold at all times
Prior to lifting the mold, concrete must be removed from
_____. Correct Answer The area surrounding the base of
the mold
After the final rodding, the sides of the slump mold should
should be tapped lightly with the tamping rod. True or
False? Correct Answer False
TECHNICIAN- GRADE I 2026-2027 EXAM
| 250 QUESTIONS WITH VERIFIED
CORRECT ANSWERS
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 Answer 5
The molding of strength test specimens shall begin within
_____ minutes after fabricating the composite sample.
Correct Answer 15
The concrete sample must be protected from
contamination and _____. Correct Answer Rapid
evaporation
The minimum size sample for making strength test
specimens is _____. Correct 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 Correct
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. Correct
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 this batch. Correct 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. True or False? Correct Answer False
The composite samples from a truck mixer must be
obtained from the _____ portion of the batch. Correct
Answer Middle
When the concrete contains aggregate larger than that
permitted for a particular test method, the sample of
concrete must be _____ _____ before making the test.
Correct Answer Wet sieved
The slump test is applicable to plastic concrete with a
maximum size aggregate of _____. Correct Answer 1.5 in.
[37.5 mm]
When the concrete contains aggregate larger than allowed
for the slump test, the large aggregate must be _____.
Correct Answer Removed by wet sieving the sample over
1.5 in. [37.5 mm] sieve
,The mold for making the slump test is in the shape of
_____. Correct Answer The frustum of a cone
The height of the slump mold is _____. Correct Answer 12
in. [300 mm]
The interior surface of the slump mold is allowed to have
minor irregularities. True or False? Correct Answer False
For use in the slump test, the end or both ends of the
tamping rod must be _____. Correct Answer Rounded to a
hemispherical tip
The sample of concrete for use in making the slump test
must be obained in accordance with ASTM Standard
_____. Correct Answer C172, Standard Practice for
Sampling Freshly Mixed Concrete
The slump mold should be in a dry condition before
beginning the test. True or False? Correct Answer False
The surface on which the slump mold will be placed must
be _____. Correct Answer Flat, level, moist,
nonabsorbent, and free of vibration
The slump mold is filled in _____ layers. Correct Answer 3
Each layer should fill approximately _____ the volume of
the mold. Correct Answer One-third
, The approximate concrete depth (in verticle distance) after
placing the first layer is _____, and the second layer is
_____. Correct Answer 2 5/8 in. [70 mm], 6 1/8 in. [160
mm]
What is the specified number of roddings for each layer?
Correct Answer 25
How deep should the tamping rod penetrate into each
layer? Correct Answer Rod each layer throughout its
depth; on the second and final layers, the rod should
penetrate into the previous layer approximately 1 in. [25
mm]
When rodding the bottom layer, the tamping rod must be
_____ to uniformly distribute the strokes. Correct Answer
Slightly inclined
What must be done if the concrete drops below the top of
the slump mold while the top layer is being rodded?
Correct Answer Add additional concrete to keep an excess
of concrete above the top of the mold at all times
Prior to lifting the mold, concrete must be removed from
_____. Correct Answer The area surrounding the base of
the mold
After the final rodding, the sides of the slump mold should
should be tapped lightly with the tamping rod. True or
False? Correct Answer False
