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Question 1
Per ASTM C172, when sampling freshly mixed concrete from a stationary mixer (other than paving mixers), what is the maximum elapsed time allowed between obtaining the first and final portions of the composite sample?
Correct Answer:
15 minutes
Question 2
According to ASTM C172, how many portions must be taken to form a composite sample from a stationary mixer?
Correct Answer:
At least 3 regularly spaced portions, but not from the very start or very end of the discharge
Question 3
Per ASTM C172, what is the minimum size of a composite sample used for strength tests of freshly mixed concrete?
Correct Answer:
1 ft^3 (28 L)
Question 4
Per ASTM C172, within what maximum time after obtaining the final sample portion must tests for slump, temperature, and air content be started?
Correct Answer:
5 minutes
Question 5
Per ASTM C172, molding of specimens for strength tests must be started within what time after fabricating the composite sample?
Correct Answer:
15 minutes
Question 1
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About this Exam

Prepare with the ACI Field Testing I Practice Questions - ACI Concrete Field Testing Technician Grade I Exam practice quiz. This question bank includes 100 questions covering astm, concrete, slump, c143, and c231. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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ACI Field Testing I Practice Questions - ACI Concrete Field Testing Technician Grade I Exam

This practice set contains 100 questions from the matching question bank and focuses on astm, concrete, slump, c143, and c231. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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