ACI AGGREGATE TESTING TECHNICIAN - LEVEL 1 - SECTION 8 2026 QUESTIONS AND ANSWERS| ACE YOUR GRADES.

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ACI AGGREGATE TESTING
TECHNICIAN - LEVEL 1 - SECTION 8
2026 QUESTIONS AND ANSWERS| ACE
YOUR GRADES.

AASHTO T 21 / ASTM C40
To establish the reference standard color solution, dissolve
reagent grade _____in concentrated sulfuric acid. - correct
answer -Potassium dichromate




AASHTO T 21 / ASTM C40
To effect this solution ____ may be necessary. - correct answer -
Gentle heat




AASHTO T 21 / ASTM C40
The standard color solution need not be freshly made for each
color comparison. - correct answer -False; must be freshly made




AASHTO T 21 / ASTM C40

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Test samples shall have a mass of approximately ____ g (lb) and
be taken from a larger sample in accordance with Method _____.
- correct answer -450 ( 1 ), T 248




AASHTO T 21 / ASTM C40
After shaking the mixture vigorously, it should stand for _____. -
correct answer -24 hours




AASHTO T 21 / ASTM C40
In comparing the supernatant liquid with the reference standard
color solution, you should compare and record whether it is
lighter, darker, or of equal color to the referenced standard. -
correct answer -True




AASHTO T 21 / ASTM C40
When using the standard color procedure, the reference standard
color solution must be prepared no longer than _____ ahead of
time. When using the alternative procedure, it is _____. - correct
answer -2 hours, not necessary




AASHTO T 21 / ASTM C40