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ACI CONCRETE FIELD TESTING TECHNICIAN-
GRADE I ACTUAL EXAM PREP 2026 ALL
QUESTIONS AND CORRECT DETAILED
ANSWERS ALREADY A GRADED |HIGHLY
RECOMMENDED BY EXPERTS |NEW AND
REVISED
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 this 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. True or False? -
ANSWER- False
The composite samples from a truck mixer must be obtained from the
_____ portion of the batch. - ANSWER- Middle
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When the concrete contains aggregate larger than that permitted for a
particular test method, the sample of concrete must be _____ _____
before making the test. - ANSWER- Wet sieved
The slump test is applicable to plastic concrete with a maximum size
aggregate of _____. - ANSWER- 1.5 in. [37.5 mm]
When the concrete contains aggregate larger than allowed for the slump
test, the large aggregate must be _____. - 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 _____. -
ANSWER- The frustum of a cone
The height of the slump mold is _____. - ANSWER- 12 in. [300 mm]
The interior surface of the slump mold is allowed to have minor
irregularities. True or False? - ANSWER- False
For use in the slump test, the end or both ends of the tamping rod must
be _____. - 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 _____. - ANSWER- C172, Standard
Practice for Sampling Freshly Mixed Concrete
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The slump mold should be in a dry condition before beginning the test.
True or False? - ANSWER- False
The surface on which the slump mold will be placed must be _____. -
ANSWER- Flat, level, moist, nonabsorbent, and free of vibration
The slump mold is filled in _____ layers. - ANSWER- 3
Each layer should fill approximately _____ the volume of the mold. -
ANSWER- One-third
The approximate concrete depth (in verticle distance) after placing the
first layer is _____, and the second layer is _____. - ANSWER- 2 5/8 in.
[70 mm], 6 1/8 in. [160 mm]
What is the specified number of roddings for each layer? - ANSWER-
25
How deep should the tamping rod penetrate into each layer? -
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. - ANSWER- Slightly inclined
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What must be done if the concrete drops below the top of the slump
mold while the top layer is being rodded? - 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 _____. -
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? - ANSWER- False
When raising the slump mold, it should not be rotated or twisted, True or
False? - ANSWER- True
How much time is allowed for lifting the slump mold? - ANSWER- 5 +-
2 seconds
The measurement for slump is made from the top of the mold to what
point of the concrete specimen? - ANSWER- The displaced original
center of the top surface of the specimen
The slump of the concrete is measured and reported to the nearest
_____. - ANSWER- 1/4 in. [5 mm]
ACI CONCRETE FIELD TESTING TECHNICIAN-
GRADE I ACTUAL EXAM PREP 2026 ALL
QUESTIONS AND CORRECT DETAILED
ANSWERS ALREADY A GRADED |HIGHLY
RECOMMENDED BY EXPERTS |NEW AND
REVISED
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 this 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. True or False? -
ANSWER- False
The composite samples from a truck mixer must be obtained from the
_____ portion of the batch. - ANSWER- Middle
,2|Page
When the concrete contains aggregate larger than that permitted for a
particular test method, the sample of concrete must be _____ _____
before making the test. - ANSWER- Wet sieved
The slump test is applicable to plastic concrete with a maximum size
aggregate of _____. - ANSWER- 1.5 in. [37.5 mm]
When the concrete contains aggregate larger than allowed for the slump
test, the large aggregate must be _____. - 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 _____. -
ANSWER- The frustum of a cone
The height of the slump mold is _____. - ANSWER- 12 in. [300 mm]
The interior surface of the slump mold is allowed to have minor
irregularities. True or False? - ANSWER- False
For use in the slump test, the end or both ends of the tamping rod must
be _____. - 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 _____. - ANSWER- C172, Standard
Practice for Sampling Freshly Mixed Concrete
,3|Page
The slump mold should be in a dry condition before beginning the test.
True or False? - ANSWER- False
The surface on which the slump mold will be placed must be _____. -
ANSWER- Flat, level, moist, nonabsorbent, and free of vibration
The slump mold is filled in _____ layers. - ANSWER- 3
Each layer should fill approximately _____ the volume of the mold. -
ANSWER- One-third
The approximate concrete depth (in verticle distance) after placing the
first layer is _____, and the second layer is _____. - ANSWER- 2 5/8 in.
[70 mm], 6 1/8 in. [160 mm]
What is the specified number of roddings for each layer? - ANSWER-
25
How deep should the tamping rod penetrate into each layer? -
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. - ANSWER- Slightly inclined
, 4|Page
What must be done if the concrete drops below the top of the slump
mold while the top layer is being rodded? - 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 _____. -
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? - ANSWER- False
When raising the slump mold, it should not be rotated or twisted, True or
False? - ANSWER- True
How much time is allowed for lifting the slump mold? - ANSWER- 5 +-
2 seconds
The measurement for slump is made from the top of the mold to what
point of the concrete specimen? - ANSWER- The displaced original
center of the top surface of the specimen
The slump of the concrete is measured and reported to the nearest
_____. - ANSWER- 1/4 in. [5 mm]
