Practice Test Geeks(ATT) ACI Aggregate Testing Technician Practice Test
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Moisture Content & Specific Gravity Flashcards

6 cards from real ATT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which ASTM standard is used to determine the moisture content of aggregates?

    Answer: ASTM C566

    ASTM C566 provides the standard test method for total moisture content of aggregates by drying.

  2. What condition must fine aggregate be in to determine surface moisture?

    Answer: Saturated surface-dry

    The saturated surface-dry (SSD) condition eliminates the influence of surface moisture for accurate calculations.

  3. What is the purpose of determining specific gravity of aggregates?

    Answer: To measure density and absorption

    Specific gravity helps in concrete mix design and quality control by measuring the density of the aggregate.

  4. Which test method determines the specific gravity of coarse aggregates?

    Answer: ASTM C127

    ASTM C127 outlines the procedure for determining specific gravity and absorption of coarse aggregates.

  5. What is the correct sequence of aggregate moisture conditions from driest to wettest?

    Answer: Oven dry, air dry, SSD, wet

    Oven dry, air dry, SSD, and then wet describe the increasing order of moisture content in aggregates.

  6. Why is SSD condition critical in concrete mix design?

    Answer: To account for water absorption accurately

    Using aggregates in SSD condition ensures that water added during mixing is not absorbed or added by the aggregate.