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ACI Test Exam Questions And Answers |Latest
2025 | Guaranteed Pass.
The total time allowed between obtaining the first and final portions of a composite sample is -
Answer✔15 minutes
When it is necessary to wet sieve the concrete sample, wet sieving should be performed after
the individual samples are remixed into a composite sample (T or F) - Answer✔F
Tests for slump, temperature, and air content must begin within ______ minutes after
obtaining the composite sample - Answer✔5 minutes
Begin molding test specimens within ______ minutes after obtaining the composite sample -
Answer✔15 minutes
The concrete samples should be protected from - Answer✔the sun, wind, and other sources of
rapid evaporation, from contamination
When test specimens are to be molded, the minimum size of sample obtained is - Answer✔28 L
(1 ft^3)
The primary objective of the sampling process is to obtain a representative sample (T or F) -
Answer✔T
When sampling from a revolving drum truck mixer collect concrete from ______ portions of the
batch - Answer✔2 or more
Wet sieving is performed - Answer✔when the concrete contains aggregates larger than
appropriate for a test
When sampling from a paving mixer it is not acceptable to place 3 small containers on the sub
grade in order to obtain the required samples of concrete (T or F) - Answer✔F
TEMPERATURE - Answer✔
it may require up to ___ min before the temp stabilizes when the NMS of the coarse agg is
greater than ___ - Answer✔20min., 3in.
1|Page
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The container for the concrete shall be large enough to provide at least ___ inches, or _____ of
coarse agg, of concrete in all directions around the TMD - Answer✔3in., 3 x NMS
The temperature measuring device shall have the capability of measuring the temperature of
the freshly mixed concrete to ± ______ oF accuracy and have a
range of ______ to ______ oF. - Answer✔1,30to120
A composite sample of concrete is not required even if the only purpose for obtaining the
sample is to determine temperature. T or F - Answer✔T
The Temperature Measuring Device used for determining concrete temperature must be
calibrated ______ or whenever there is a question of accuracy. - Answer✔annually
The temperature of freshly mixed concrete can be measured in - Answer✔all of the above
Submerge the sensing portion of the thermometer at least ______ inches into the concrete -
Answer✔3
Gently press concrete around the thermometer such that the_______ does not
affect the reading. - Answer✔ambient air temp
The thermometer must remain in the concrete during the measurement for a minimum of
______ minutes. In addition, the temperature measurement must be completed within
_______ minutes after obtaining the sample. - Answer✔2, 5
The temperature of freshly mixed concrete is measured and recorded to the nearest _____ -
Answer✔1 degree
SLUMP TEST - Answer✔
****The slump test does not provide an indication of the water content of a concrete mixture. -
Answer✔F
A slump mold can be fabricated from both plastic and metal. - Answer✔T
****The length of the tamping for the slump test shall be approximately - Answer✔
The slump test is applicable to concrete having a coarse aggregate up to _______ inch in size. -
Answer✔1.5 inches
The height of the slump cone is - Answer✔12 in
6. The exterior of the slump cone is tapped 10 to 15 times after rodding each layer. - Answer✔F
The slump mold is filled with three layers of concrete - Answer✔by volume
2|Page
ACI Test Exam Questions And Answers |Latest
2025 | Guaranteed Pass.
The total time allowed between obtaining the first and final portions of a composite sample is -
Answer✔15 minutes
When it is necessary to wet sieve the concrete sample, wet sieving should be performed after
the individual samples are remixed into a composite sample (T or F) - Answer✔F
Tests for slump, temperature, and air content must begin within ______ minutes after
obtaining the composite sample - Answer✔5 minutes
Begin molding test specimens within ______ minutes after obtaining the composite sample -
Answer✔15 minutes
The concrete samples should be protected from - Answer✔the sun, wind, and other sources of
rapid evaporation, from contamination
When test specimens are to be molded, the minimum size of sample obtained is - Answer✔28 L
(1 ft^3)
The primary objective of the sampling process is to obtain a representative sample (T or F) -
Answer✔T
When sampling from a revolving drum truck mixer collect concrete from ______ portions of the
batch - Answer✔2 or more
Wet sieving is performed - Answer✔when the concrete contains aggregates larger than
appropriate for a test
When sampling from a paving mixer it is not acceptable to place 3 small containers on the sub
grade in order to obtain the required samples of concrete (T or F) - Answer✔F
TEMPERATURE - Answer✔
it may require up to ___ min before the temp stabilizes when the NMS of the coarse agg is
greater than ___ - Answer✔20min., 3in.
1|Page
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 1:27PM. A+
The container for the concrete shall be large enough to provide at least ___ inches, or _____ of
coarse agg, of concrete in all directions around the TMD - Answer✔3in., 3 x NMS
The temperature measuring device shall have the capability of measuring the temperature of
the freshly mixed concrete to ± ______ oF accuracy and have a
range of ______ to ______ oF. - Answer✔1,30to120
A composite sample of concrete is not required even if the only purpose for obtaining the
sample is to determine temperature. T or F - Answer✔T
The Temperature Measuring Device used for determining concrete temperature must be
calibrated ______ or whenever there is a question of accuracy. - Answer✔annually
The temperature of freshly mixed concrete can be measured in - Answer✔all of the above
Submerge the sensing portion of the thermometer at least ______ inches into the concrete -
Answer✔3
Gently press concrete around the thermometer such that the_______ does not
affect the reading. - Answer✔ambient air temp
The thermometer must remain in the concrete during the measurement for a minimum of
______ minutes. In addition, the temperature measurement must be completed within
_______ minutes after obtaining the sample. - Answer✔2, 5
The temperature of freshly mixed concrete is measured and recorded to the nearest _____ -
Answer✔1 degree
SLUMP TEST - Answer✔
****The slump test does not provide an indication of the water content of a concrete mixture. -
Answer✔F
A slump mold can be fabricated from both plastic and metal. - Answer✔T
****The length of the tamping for the slump test shall be approximately - Answer✔
The slump test is applicable to concrete having a coarse aggregate up to _______ inch in size. -
Answer✔1.5 inches
The height of the slump cone is - Answer✔12 in
6. The exterior of the slump cone is tapped 10 to 15 times after rodding each layer. - Answer✔F
The slump mold is filled with three layers of concrete - Answer✔by volume
2|Page
