ACI Concrete Field Testing Technician-
Grade I {latest 2026 -2027 update}
questions and answers 100% correct
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
When raising the slump mold, it should not be rotated or twisted, True or False? -
correct answer True
How much time is allowed for lifting the slump mold? - correct answer 5 +- 2 seconds
,The measurement for slump is made from the top of the mold to what point of the
concrete specimen? - correct answer The displaced original center of the top surface
of the specimen
The slump of the concrete is measured and reported to the nearest _____. - correct
answer 1/4 in. [5 mm]
How much time is allowed to conduct the slump test from beginning to completion? -
correct answer 2 1/2 minutes
The diameter of the tamping rod used in the test method is _____. - correct answer 5/8
in. [16 mm]
, What is the required shape of the tamping end of the rod? - correct answer Rounded to
a hemispherical tip
What is the required minimum frequency of the vibrator used in this test method? -
correct answer 7000 vibrations per minute
The outside diameter or side dimension of the vibrating element must be at least _____
but not greater than _____. - correct 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? -
correct answer False, measure must be steel or another suitable metal
What is the minimum thickness of a metal strike-off plate? - correct answer 1/4 in. [6
mm]
Grade I {latest 2026 -2027 update}
questions and answers 100% correct
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
When raising the slump mold, it should not be rotated or twisted, True or False? -
correct answer True
How much time is allowed for lifting the slump mold? - correct answer 5 +- 2 seconds
,The measurement for slump is made from the top of the mold to what point of the
concrete specimen? - correct answer The displaced original center of the top surface
of the specimen
The slump of the concrete is measured and reported to the nearest _____. - correct
answer 1/4 in. [5 mm]
How much time is allowed to conduct the slump test from beginning to completion? -
correct answer 2 1/2 minutes
The diameter of the tamping rod used in the test method is _____. - correct answer 5/8
in. [16 mm]
, What is the required shape of the tamping end of the rod? - correct answer Rounded to
a hemispherical tip
What is the required minimum frequency of the vibrator used in this test method? -
correct answer 7000 vibrations per minute
The outside diameter or side dimension of the vibrating element must be at least _____
but not greater than _____. - correct 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? -
correct answer False, measure must be steel or another suitable metal
What is the minimum thickness of a metal strike-off plate? - correct answer 1/4 in. [6
mm]
