Practice Test Geeks(NETTCP) New England Transportation Technician Certification Program Practice Test
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Quality Control Flashcards

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

Read the first 7 Quality Control flashcards as text

  1. Which AASHTO test method is used to determine the bulk specific gravity of compacted HMA specimens?

    Answer: AASHTO T 166

    AASHTO T 166 determines the bulk specific gravity (Gmb) of compacted bituminous mixtures using the saturated surface-dry (SSD) method.

  2. What is the acceptable range for the temperature of fresh Portland cement concrete at the point of delivery, per most state DOT specifications?

    Answer: Between 50°F and 90°F (10°C and 32°C)

    Most transportation agency specifications require fresh concrete temperature at delivery to be between 50°F and 90°F to ensure proper hydration and workability.

  3. What is the significance of the 'percent within limits' (PWL) statistic in highway construction QA/QC?

    Answer: It estimates the percentage of a lot that meets specification requirements

    PWL estimates the proportion of the production lot that falls within specification limits, and is used to determine pay factors in many state DOT contracts.

  4. During compaction of an embankment, field density tests show 91% relative compaction when 95% is required. Which action is most appropriate?

    Answer: Apply additional roller passes and retest

    When compaction is below the specified minimum, additional roller passes are made to increase density before the next lift is placed, then the area is retested.

  5. What information must be recorded on the concrete field test report at the point of sampling?

    Answer: Time of sampling, truck number, load number, air temperature, and test results

    A complete concrete field report requires sampling time, truck and load identification, ambient conditions, and all field test results to ensure traceability.

  6. The term 'referee testing' in QA/QC programs refers to:

    Answer: Independent testing by a third party to resolve disputes between agency and contractor results

    Referee testing is performed by an independent laboratory to resolve disagreements between the contractor's QC and the agency's QA test results.

  7. What does a failing result on a boiling water soundness test (AASHTO T 103) indicate about aggregate?

    Answer: The aggregate is susceptible to disintegration when exposed to freeze-thaw cycles

    The boiling water soundness test identifies aggregate with clay coatings or weak particles that would break down under freeze-thaw weathering conditions.