Practice Test Geeks(NETTCP) New England Transportation Technician Certification Program Practice Test
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Field Testing 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 Field Testing flashcards as text

  1. A field technician is conducting a straight-edge test on a newly paved asphalt surface. A 10-foot (3 m) straightedge is placed parallel to the centerline. The maximum allowable deviation under the straightedge per most New England DOT specs is:

    Answer: 1/4 inch (6 mm)

    Most New England DOT specifications allow a maximum deviation of 1/4 inch (6 mm) under a 10-foot straightedge for finished asphalt surfaces.

  2. During culvert installation inspection, a field technician finds that the bedding material under a corrugated metal pipe does not extend the full pipe width. This deficiency will most likely cause:

    Answer: Differential settlement and uneven load distribution

    Inadequate bedding support creates uneven load transfer, leading to differential settlement, pipe distortion, and potential failure over time.

  3. What field test is used to evaluate the surface friction characteristics of a wet pavement using a locked-wheel trailer?

    Answer: Skid Resistance Test (ASTM E274)

    ASTM E274 uses a locked-wheel skid trailer towed at 40 mph on a wetted pavement to measure the friction number as a Skid Number (SN).

  4. A technician is sampling aggregate from a stockpile for gradation testing. To obtain a representative sample, the technician should:

    Answer: Collect multiple increments from various locations and depths, then quarter down

    Stockpiles segregate by particle size during placement; collecting multiple increments from varied locations and reducing by quartering gives a representative sample.

  5. During a field inspection of reinforcing steel placement, a technician measures 2-inch (50 mm) clear cover where the plan requires 3 inches (75 mm). The appropriate action is:

    Answer: Document the nonconformance and require the contractor to correct before concrete placement

    Inadequate rebar cover reduces corrosion protection and must be corrected before concrete is placed, as the deficiency cannot be remedied afterward.

  6. When performing field compaction testing on granular base course using the nuclear density gauge in the backscatter mode, what is being measured?

    Answer: Density and moisture of the top 2–3 inches of material

    Backscatter mode measures gamma radiation reflected from the top 2–3 inches of the surface layer and is suitable only for thin layers or surface evaluation.

  7. A field technician observes that the contractor's paver screed is leaving a coarse, rough texture on the asphalt mat surface. The most likely cause is:

    Answer: Mix temperature too low causing material to tear rather than flow under the screed

    When HMA is too cold, it loses workability and tears under the screed rather than flowing smoothly, resulting in a coarse, raveled surface texture.