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ACI AGGREGATE TESTING
TECHNICIAN 2026 QUESTIONS AND
ANSWERS| ACE YOUR GRADES.
Performance Checklist:
Organic Impurities in Fine Aggregates for Concrete
8 Steps - correct answer -*Sample Preparation*
1. Obtain a sample by Method T 248 / ASTM C 702.
2. If the sample is dried prior to testing, dry only by air drying.
3. Ensure the sample weighs about 450g (1 lb).
*Procedure*
4. Add fine aggregate to the 130-mL (4-1/2 oz.) level in the bottle.
5. Add NaOH solution to the 200-mL (7-oz.) level (after shaking).
6. Stopper the bottle and shake vigorously.
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7. Allow bottle to stand for 24 hours.
8. Make color comparison against color standards.
Sampling should be done very carefully because it is as important
as ____________. - correct answer -Testing
The four sources from which field samples can be obtained
include:
1) ____________
2) ____________
3) ____________
4) ____________ - correct answer -1) Conveyer belts
2) Transport units
3) Roadways
4) Stockpiles
Shipping containers for aggregate samples should be made so
that contents will not be lost, ____________ or ____________. -
correct answer -Contaminated; damaged
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*Reducing Samples*
Unless the procedures recommended here are carried out
precisely, a ____________ sample can result. - correct answer -
Nonrepresentative
*Reducing Samples*
Generally speaking, small samples are most representative of the
total supply. True or False? - correct answer -False; large
samples are more representative
*Reducing Samples*
There are some instances in which ____________ between the
test samples can't be avoided. - correct answer -Differences
*Reducing Samples*
When reduction of the field sample before testing isn't
recommended, the ____________ field sample should be tested.
- correct answer -Entire
*Reducing Samples*
ACI AGGREGATE TESTING
TECHNICIAN 2026 QUESTIONS AND
ANSWERS| ACE YOUR GRADES.
Performance Checklist:
Organic Impurities in Fine Aggregates for Concrete
8 Steps - correct answer -*Sample Preparation*
1. Obtain a sample by Method T 248 / ASTM C 702.
2. If the sample is dried prior to testing, dry only by air drying.
3. Ensure the sample weighs about 450g (1 lb).
*Procedure*
4. Add fine aggregate to the 130-mL (4-1/2 oz.) level in the bottle.
5. Add NaOH solution to the 200-mL (7-oz.) level (after shaking).
6. Stopper the bottle and shake vigorously.
, Page | 2
7. Allow bottle to stand for 24 hours.
8. Make color comparison against color standards.
Sampling should be done very carefully because it is as important
as ____________. - correct answer -Testing
The four sources from which field samples can be obtained
include:
1) ____________
2) ____________
3) ____________
4) ____________ - correct answer -1) Conveyer belts
2) Transport units
3) Roadways
4) Stockpiles
Shipping containers for aggregate samples should be made so
that contents will not be lost, ____________ or ____________. -
correct answer -Contaminated; damaged
, Page | 3
*Reducing Samples*
Unless the procedures recommended here are carried out
precisely, a ____________ sample can result. - correct answer -
Nonrepresentative
*Reducing Samples*
Generally speaking, small samples are most representative of the
total supply. True or False? - correct answer -False; large
samples are more representative
*Reducing Samples*
There are some instances in which ____________ between the
test samples can't be avoided. - correct answer -Differences
*Reducing Samples*
When reduction of the field sample before testing isn't
recommended, the ____________ field sample should be tested.
- correct answer -Entire
*Reducing Samples*
