ACI WRITTEN EXAM QUESTIONS AND ANSWERS UPDATED (2024/2025) (VERIFIED ANSWERS)
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Course
ACI
Institution
ACI
ACI WRITTEN EXAM QUESTIONS AND ANSWERS UPDATED (2024/2025) (VERIFIED ANSWERS)ACI WRITTEN EXAM QUESTIONS AND ANSWERS UPDATED (2024/2025) (VERIFIED ANSWERS)ACI WRITTEN EXAM QUESTIONS AND ANSWERS UPDATED (2024/2025) (VERIFIED ANSWERS)ACI WRITTEN EXAM QUESTIONS AND ANSWERS UPDATED (2024/2025) (VERIFIED...
ACI WRITTEN EXAM QUESTIONS AND
ANSWERS UPDATED (2024/2025)
(VERIFIED ANSWERS)
The sample of concrete used for temp determination must be rodded 25
times - ANS ✓False
Sampling by this method is required when tests are to be made to
determine ____ with specification requirements - ANS ✓compliance
The method covers sampling from four types of mixers which are _____, _____,
____, and _______ - ANS ✓stationary mixes, paving mixers, revolving drum mixers
and open top mixers
The maximum allowable time between obtaining the first and final
portions of a composite sample is ______ minutes - ANS ✓15
Portions of a composite sample shall be thoroughly remixed before
beginning tests on the sample - ANS ✓True
The maximum elapsed time allowed between obtaining the final portion of
the composite sample and beginning the tests for slump, temp, and air
content is ______ minutes - ANS ✓5
1
ACI Written
,ACI
the molding of strength test specimens shall begin within ____ minutes after
fabricating the composite sample - ANS ✓15
The concrete sample must be protected from contamination and ____ - ANS
✓rapid evaporation
The minimum size sample test specimen is - ANS ✓28 L (1ft^3)
when sampling from a stationary mixer the batch must be sampled at _____
or more regularly spaced intervals during discharge of the middle portion
of the batch - ANS ✓2
The composite sample for a paving mixer must represent a minimum of
_____ different portions of the batch of concrete taken from the pile after
discharge - ANS ✓5
When sampling from a revolving drum truck mixer, concrete must be
sampled at a minimum of ______ regularly spaced intervals during discharge
of the middle portion of the batch - ANS ✓2
Concrete samples from a truck mixer must be obtained before any water or
admixtures are added to the mixer at the job site - ANS ✓False
2
ACI Written
, ACI
The composite sample from a truck mixer must be obtained from the _____
portion of the batch - ANS ✓Middle
When the concrete contains aggregate larger than permitted for a
particular test method, the sample fo concrete must be ______ ______ before
making the test - ANS ✓Wet Sieved
The slump test is applicable to plastic concrete with a max aggregate size of
____ in - ANS ✓1.5 in (37.5 mm)
When concrete contains aggregate larger than allowed for the slump test
the large aggregate must be - ANS ✓removed by wet sieving the sample over
1.5 in sieve
The mold for making the slump test is the shape of - ANS ✓the frustum of a
cone
The height fo the slump mold is _____ in - ANS ✓12
The interior surface of the slump mold is allowed to have minor
irregularities - ANS ✓false
For use in the slump test, the end or both ends of the tamping rod must be -
ANS ✓rounded
3
ACI Written
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