ACI Certification Exam Questions and
Answers 100% Pass
2. T/F: When the concrete contains large aggregate, the testing technician should wet-
sieve the sample before making unit weight tests for use in yield computations. -
ANSWER✔✔-False
4. T/F: Samples smaller than 28L (1 cu.ft.) are allowed on routine air content,
temperature, and slump tests. - ANSWER✔✔-True
7. How do you regulate the rate of discharge of the batch from the revolving truck
drum mixer or agitator? - ANSWER✔✔-By the rate of revolution of the drum
10. While the technician is checking the slump of the concrete, there is a decided falling
away or shearing off of the concrete from one side of the sample. What should the
technician do? - ANSWER✔✔-Disregard the test and retest on another portion of the
sample
11. The mold is filled in three equal layers by volume, which makes the first third at
_______, and the second third at ________. - ANSWER✔✔-2 5/8, 6 1/8
15. What is the difference allowed by ACI when certifying an individual test using a
plastic slump cone vs. a metal slump cone? - ANSWER✔✔-0.5 inches
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, 16. T/F: The sides of the slump mold should be lightly tapped to consolidate the
concrete in the mold. - ANSWER✔✔-False
18. T/F: ASTM C 1064 defines the maximum recommended temperature for concrete. -
ANSWER✔✔-False
19. The temperature test method must be complete with in _________ after obtaining the
sample. - ANSWER✔✔-5 minutes
20. Each temperature-measuring device should be calibrated ________, or whenever
there is a question of _________. - ANSWER✔✔-annually, accuracy
23. T/F: After strike off of the measure used to determine density, a small quantity of
concrete may be added to correct a deficiency? - ANSWER✔✔-False
26. What is the required shape at the end of the tamping rod? - ANSWER✔✔-rounded
to a hemispherical tip
28. How do you find the density of a concrete batch? - ANSWER✔✔-(mass of measure
with concrete - mass of measure) / volume of measure
29. How do you find the yield of a concrete batch? - ANSWER✔✔-(mass of all materials
batched / (density of concrete * 27))
33. T/F: Test method ASTM C231 is intended for use with all concretes and aggregates
for which an aggregate correction factor can be determined - ANSWER✔✔-False
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Answers 100% Pass
2. T/F: When the concrete contains large aggregate, the testing technician should wet-
sieve the sample before making unit weight tests for use in yield computations. -
ANSWER✔✔-False
4. T/F: Samples smaller than 28L (1 cu.ft.) are allowed on routine air content,
temperature, and slump tests. - ANSWER✔✔-True
7. How do you regulate the rate of discharge of the batch from the revolving truck
drum mixer or agitator? - ANSWER✔✔-By the rate of revolution of the drum
10. While the technician is checking the slump of the concrete, there is a decided falling
away or shearing off of the concrete from one side of the sample. What should the
technician do? - ANSWER✔✔-Disregard the test and retest on another portion of the
sample
11. The mold is filled in three equal layers by volume, which makes the first third at
_______, and the second third at ________. - ANSWER✔✔-2 5/8, 6 1/8
15. What is the difference allowed by ACI when certifying an individual test using a
plastic slump cone vs. a metal slump cone? - ANSWER✔✔-0.5 inches
Copyright ©SOPHIABENNETT 2025 ACADEMIC YEARALL RIGHTS RESERVED. Page 1/8
, 16. T/F: The sides of the slump mold should be lightly tapped to consolidate the
concrete in the mold. - ANSWER✔✔-False
18. T/F: ASTM C 1064 defines the maximum recommended temperature for concrete. -
ANSWER✔✔-False
19. The temperature test method must be complete with in _________ after obtaining the
sample. - ANSWER✔✔-5 minutes
20. Each temperature-measuring device should be calibrated ________, or whenever
there is a question of _________. - ANSWER✔✔-annually, accuracy
23. T/F: After strike off of the measure used to determine density, a small quantity of
concrete may be added to correct a deficiency? - ANSWER✔✔-False
26. What is the required shape at the end of the tamping rod? - ANSWER✔✔-rounded
to a hemispherical tip
28. How do you find the density of a concrete batch? - ANSWER✔✔-(mass of measure
with concrete - mass of measure) / volume of measure
29. How do you find the yield of a concrete batch? - ANSWER✔✔-(mass of all materials
batched / (density of concrete * 27))
33. T/F: Test method ASTM C231 is intended for use with all concretes and aggregates
for which an aggregate correction factor can be determined - ANSWER✔✔-False
Copyright ©SOPHIABENNETT 2025 ACADEMIC YEARALL RIGHTS RESERVED. Page 2/8
