ACI GRADE 1 WRITTEN EXAM LATEST 2023-2024 ACTUAL EXAM 200 QUESTIONS AND CORRECT DETAILED
ANSWERS
The temp. measuring device shall be capable of accurately measuring the temp. of freshly mixed
concrete to ____ throughout a range of ____. - (answer) 1 Degree F, 30-120 Degrees F
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
, ACI GRADE 1 WRITTEN EXAM LATEST 2023-2024 ACTUAL EXAM 200 QUESTIONS AND CORRECT DETAILED
ANSWERS
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
What is the minimum allowable capacity of the measuring bowl used in Test Method C231/C231M? -
(answer) 6L (0.2ft^3)
What are the required characteristics of the tamping rod used in Test Method C231/C231M? - (answer)
Round, straight steel rod, w/ a 16 mm (5/8 in) +-2 mm (1/16 in) diameter, length of at least 100 mm (4
in) greater than the depth of the measuring bowl, but not greater than 600 mm (24 in) in overall length
w/ the tamping end rounded to a hemispherical tip of the same diameter as the rod
What is the specified size of the mallet required for Test Method C231/C231M when the measuring
bowl has a capacity of 14 L (0.5 ft^3) or less? - (answer) 1 & 1/4 lbs +-0.5 lbs
The maximum size aggregate allowed for Test Method C231/C231M is ___. - (answer) 2 in
What tools maybe used to strike off the top surface of the concrete following consolidation of the final
layer? - (answer) strike-off plate made of acrylic, glass, or metal
What are the requirements of the strike off bar used in Test Method C173/C173M? - (answer) Flat
straight steel bar at least 3 x 20 x 300 mm (1/8 x 3/4 x 12 in) or a flat straight high density polyethyline
bar, or plastic of equal or greater abrasion resistance at least 6 x 20 x 300 mm (1/4 x 3/4 x 12 in)
In Test Method C173/C173M, When filling the measuring bowl of the air meter, the concrete must be
placed in _____ layers of equal volume. - (answer) 2
ANSWERS
The temp. measuring device shall be capable of accurately measuring the temp. of freshly mixed
concrete to ____ throughout a range of ____. - (answer) 1 Degree F, 30-120 Degrees F
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
, ACI GRADE 1 WRITTEN EXAM LATEST 2023-2024 ACTUAL EXAM 200 QUESTIONS AND CORRECT DETAILED
ANSWERS
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
What is the minimum allowable capacity of the measuring bowl used in Test Method C231/C231M? -
(answer) 6L (0.2ft^3)
What are the required characteristics of the tamping rod used in Test Method C231/C231M? - (answer)
Round, straight steel rod, w/ a 16 mm (5/8 in) +-2 mm (1/16 in) diameter, length of at least 100 mm (4
in) greater than the depth of the measuring bowl, but not greater than 600 mm (24 in) in overall length
w/ the tamping end rounded to a hemispherical tip of the same diameter as the rod
What is the specified size of the mallet required for Test Method C231/C231M when the measuring
bowl has a capacity of 14 L (0.5 ft^3) or less? - (answer) 1 & 1/4 lbs +-0.5 lbs
The maximum size aggregate allowed for Test Method C231/C231M is ___. - (answer) 2 in
What tools maybe used to strike off the top surface of the concrete following consolidation of the final
layer? - (answer) strike-off plate made of acrylic, glass, or metal
What are the requirements of the strike off bar used in Test Method C173/C173M? - (answer) Flat
straight steel bar at least 3 x 20 x 300 mm (1/8 x 3/4 x 12 in) or a flat straight high density polyethyline
bar, or plastic of equal or greater abrasion resistance at least 6 x 20 x 300 mm (1/4 x 3/4 x 12 in)
In Test Method C173/C173M, When filling the measuring bowl of the air meter, the concrete must be
placed in _____ layers of equal volume. - (answer) 2
