Practice Test Geeks(CFB) Certified Field Builder Practice Test
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Materials Selection Flashcards

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

Read the first 7 Materials Selection flashcards as text

  1. Which material is most appropriate for a synthetic turf infill when drainage performance is the top priority?

    Answer: Silica sand

    Silica sand provides the best drainage performance in synthetic turf infill due to its high permeability and consistent particle size.

  2. A field builder is selecting base aggregate for a natural grass sports field. Which gradation is most commonly specified?

    Answer: USGA-spec rootzone mix

    USGA-spec rootzone mix is the industry standard for natural grass sports fields because it balances drainage, aeration, and turfgrass support.

  3. When selecting underlayment padding for synthetic turf, what property directly affects player safety ratings (Gmax)?

    Answer: Shock absorption capacity

    Shock absorption capacity of the underlayment directly determines the Gmax value, which is the primary measure of head injury risk reduction.

  4. Which geotextile type is preferred beneath a permeable base course to prevent subgrade migration?

    Answer: Nonwoven needle-punched geotextile

    Nonwoven needle-punched geotextile acts as a separation and filtration layer, preventing fine subgrade particles from migrating into the base course.

  5. A Certified Field Builder is comparing polypropylene (PP) and polyethylene (PE) synthetic turf fibers. What is the key advantage of PE fibers?

    Answer: Softer feel and better player comfort

    Polyethylene fibers are softer than polypropylene and provide better player comfort and skin-friendliness upon contact.

  6. Which characteristic of recycled crumb rubber infill has raised environmental and health concerns on synthetic turf fields?

    Answer: Heavy metal and PAH content

    Recycled crumb rubber can contain polycyclic aromatic hydrocarbons (PAHs) and trace heavy metals from tire manufacturing, which have raised health concerns.

  7. What is the primary function of a drainage layer composed of open-graded aggregate beneath a synthetic turf system?

    Answer: Allow rapid vertical drainage away from the field

    An open-graded aggregate drainage layer allows stormwater to move vertically and laterally away from the field surface, preventing ponding.