ACI Concrete Field Testing Technician- Grade I
Version 1 Actual Exam Newest 2026-2027 With
Complete Questions And Correct Detailed
Answers| Brand New Version!
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
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
1|Page
,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]
How much time is allowed to conduct the slump test from beginning to
completion? - ANSWER-2 1/2 minutes
The diameter of the tamping rod used in the test method is _____. -
ANSWER-5/8 in. [16 mm]
2|Page
, What is the required shape of the tamping end of the rod? - ANSWER-
Rounded to a hemispherical tip
What is the required minimum frequency of the vibrator used in this
test method? - ANSWER-7000 vibrations per minute
The outside diameter or side dimension of the vibrating element must
be at least _____ but not greater than _____. - ANSWER-0.75 in. [19
mm], 1.50 in. [38 mm]
A plastic container can be used for the measure in this method. True or
False? - ANSWER-False, measure must be steel or another suitable
metal
What is the minimum thickness of a metal strike-off plate? - ANSWER-
1/4 in. [6 mm]
What is the minimum thickness for a glass or acrylic strike-off plate? -
ANSWER-1/2 in. [12 mm]
What is the specified weight of the mallet used on measures that are
0.5 ft^3 [14 L] or smaller? - ANSWER-1.25 +- 0.50 lb. [600 +- 200 g]
3|Page
Version 1 Actual Exam Newest 2026-2027 With
Complete Questions And Correct Detailed
Answers| Brand New Version!
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
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
1|Page
,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]
How much time is allowed to conduct the slump test from beginning to
completion? - ANSWER-2 1/2 minutes
The diameter of the tamping rod used in the test method is _____. -
ANSWER-5/8 in. [16 mm]
2|Page
, What is the required shape of the tamping end of the rod? - ANSWER-
Rounded to a hemispherical tip
What is the required minimum frequency of the vibrator used in this
test method? - ANSWER-7000 vibrations per minute
The outside diameter or side dimension of the vibrating element must
be at least _____ but not greater than _____. - ANSWER-0.75 in. [19
mm], 1.50 in. [38 mm]
A plastic container can be used for the measure in this method. True or
False? - ANSWER-False, measure must be steel or another suitable
metal
What is the minimum thickness of a metal strike-off plate? - ANSWER-
1/4 in. [6 mm]
What is the minimum thickness for a glass or acrylic strike-off plate? -
ANSWER-1/2 in. [12 mm]
What is the specified weight of the mallet used on measures that are
0.5 ft^3 [14 L] or smaller? - ANSWER-1.25 +- 0.50 lb. [600 +- 200 g]
3|Page
