ACI WRITTEN EXAM 2026 COMPREHENSIVE
ASSESSMENT
◉ A composite sample of concrete is required even if the only
purpose for obtaining the sample is to determine the temp. T or F?
Answer: False
◉ C172/C172M covers sampling from five type of equipment which
are___, ___, ___, ___, & ____? Answer: revolving drum, stationary, paving,
continuous, & open top
◉ The mold for making the slump test is in the shape of ____. Answer:
the frustum of a cone
◉ The surface on which the slump mold will be placed must be ____.
Answer: Flat, moist non-absorbent, & rigid
◉ How deep should the tamping rod penetrate each layer? Answer:
Rod each layer throughout it's depth , on second & final layer the rod
should penetrate into the previous layer approximately 1 in.
◉ Prior to lifting the mold, concrete must be removed from ____.
Answer: the area surrounding the base of the mold
, ◉ What is the minimum frequency of the vibrator used in Test
Method C138/C138M Answer: 9000 Vibrations/Min., 150 Hertz
◉ What is the minimum thickness of a metal strike-off plate used in
Test Method C138/C138M? Answer: 1/4 in.
◉ What is the minimum thickness of a glass/acrylic strike-off plate
used in Test Method C138/C138M? Answer: 1/2 in.
◉ Measures other than air meter bowls used for Test Method
C138/C138M must conform to Test Method ___. Answer: C29/C29M
◉ Air meter bowls used for Test Method C138/C138M must conform
to Test Method ___ and be calibrated for volume according to Test
Method ___. Answer: C231, C29
◉ The pressure method of determining air content can be used on
concrete containing ___ ____ aggregate. Answer: relatively dense
◉ The pressure method of determining air content cannot be used
on concrete containing the following types of aggregate: ___, ___, &
___. Answer: light weight, air-cooled blast furnace slag, & aggregate
of high porosity
ASSESSMENT
◉ A composite sample of concrete is required even if the only
purpose for obtaining the sample is to determine the temp. T or F?
Answer: False
◉ C172/C172M covers sampling from five type of equipment which
are___, ___, ___, ___, & ____? Answer: revolving drum, stationary, paving,
continuous, & open top
◉ The mold for making the slump test is in the shape of ____. Answer:
the frustum of a cone
◉ The surface on which the slump mold will be placed must be ____.
Answer: Flat, moist non-absorbent, & rigid
◉ How deep should the tamping rod penetrate each layer? Answer:
Rod each layer throughout it's depth , on second & final layer the rod
should penetrate into the previous layer approximately 1 in.
◉ Prior to lifting the mold, concrete must be removed from ____.
Answer: the area surrounding the base of the mold
, ◉ What is the minimum frequency of the vibrator used in Test
Method C138/C138M Answer: 9000 Vibrations/Min., 150 Hertz
◉ What is the minimum thickness of a metal strike-off plate used in
Test Method C138/C138M? Answer: 1/4 in.
◉ What is the minimum thickness of a glass/acrylic strike-off plate
used in Test Method C138/C138M? Answer: 1/2 in.
◉ Measures other than air meter bowls used for Test Method
C138/C138M must conform to Test Method ___. Answer: C29/C29M
◉ Air meter bowls used for Test Method C138/C138M must conform
to Test Method ___ and be calibrated for volume according to Test
Method ___. Answer: C231, C29
◉ The pressure method of determining air content can be used on
concrete containing ___ ____ aggregate. Answer: relatively dense
◉ The pressure method of determining air content cannot be used
on concrete containing the following types of aggregate: ___, ___, &
___. Answer: light weight, air-cooled blast furnace slag, & aggregate
of high porosity
