Practice Test Geeks(ATT) ACI Aggregate Testing Technician Practice Test
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Sampling Aggregates 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 outlines procedures for sampling aggregates?

    Answer: ASTM D75/D75M

    ASTM D75/D75M specifies methods for sampling aggregates from various sources to ensure representative samples.

  2. When sampling from a stockpile, what is the most important principle to follow?

    Answer: Collect from various depths and locations.

    Sampling from multiple locations and depths ensures the sample is representative of the entire stockpile.

  3. How should a field sample be reduced to testing size?

    Answer: Using a mechanical splitter or quartering method.

    Mechanical splitting or quartering methods must be used to reduce the sample without bias.

  4. Which of the following is a valid sampling location for aggregate in transport?

    Answer: From a stopped conveyor or truck bed.

    Sampling from a stopped conveyor or transport vehicle ensures a more uniform and accessible sample.

  5. Why must aggregate samples be protected from moisture loss?

    Answer: To maintain accurate test results.

    Moisture loss alters weight and affects tests like specific gravity or moisture content, leading to inaccurate results.

  6. What is the minimum number of increments required when sampling from a flowing stream?

    Answer: Five

    A minimum of five equal increments must be taken to ensure a proper composite sample per ASTM D75.