CFB Materials Selection 2

Question 1

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

Accepted Answer

Silica sand

Answer

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

Question 2

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

Accepted Answer

USGA-spec rootzone mix

Answer

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

Question 3

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

Accepted Answer

Shock absorption capacity

Answer

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

Question 4

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

Accepted Answer

Nonwoven needle-punched geotextile

Answer

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

Question 5

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

Accepted Answer

Softer feel and better player comfort

Answer

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

(CFB) Certified Field Builder Practice Test