1|Page
ACI Concrete Field Testing Technician-
Grade I| Comprehensive Q&A For
Certification Success 2026
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
,2|Page
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
,3|Page
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
, 4|Page
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]
ACI Concrete Field Testing Technician-
Grade I| Comprehensive Q&A For
Certification Success 2026
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
,2|Page
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
,3|Page
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
, 4|Page
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]
