ACI (AMERICAN CONCRETE INSTITUTE) WRITTEN EXAM 2024 ACTUAL
EXAM 150 QUESTIONS WITH DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS) ALREADY GRADED A+
Concrete samples from a truck mixer must be
obtained before any water or admixtures are
added to the mixer at the job site -
....ANSWER >>>>False
The composite sample from a truck mixer
must be obtained from the _____ portion of
the batch - ....ANSWER >>>>Middle
When the concrete contains aggregate larger
than permitted for a particular test method,
the sample fo concrete must be ______
, Page |2
______ before making the test - ....ANSWER
>>>>Wet Sieved
The slump test is applicable to plastic
concrete with a max aggregate size of ____ in
- ....ANSWER >>>>1.5 in (37.5 mm)
When concrete contains aggregate larger
than allowed for the slump test the large
aggregate must be - ....ANSWER
>>>>removed by wet sieving the sample over
1.5 in sieve
The mold for making the slump test is the
shape of - ....ANSWER >>>>the frustum of a
cone
The height fo the slump mold is _____ in -
....ANSWER >>>>12
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The interior surface of the slump mold is
allowed to have minor irregularities -
....ANSWER >>>>false
For use in the slump test, the end or both
ends of the tamping rod must be - ....ANSWER
>>>>rounded
the sample of concrete for use in making the
slump test must be obtained in accordance
with ASTM standard ________ - ....ANSWER
>>>>C172 (Standard Practice for sampling
freshly mixed concrete
The slump mold should be in a dry condition
before the beginning of the test - ....ANSWER
>>>>false
the surface on which the slump mold will be
placed must be _____ - ....ANSWER >>>>flat,
level moist, nonabsorbent, free of vibration
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