CFB Materials Selection 3 — Questions and Answers
Question 1: A field builder must select turf fiber pile height for a soccer-specific synthetic field. What range is typically specified by FIFA Quality Programme standards?
- 20–30 mm
- 40–60 mm (Correct answer)
- 60–80 mm
- 10–15 mm
Correct answer: 40–60 mm
FIFA Quality Programme for football (soccer) specifies synthetic turf pile heights in the 40–60 mm range for proper ball roll and player interaction.
Question 2: Which material is typically used for the backing of synthetic turf to provide dimensional stability and tuftbind strength?
- Polyurethane foam
- Woven polypropylene with latex coating (Correct answer)
- EPDM rubber sheet
- High-density polyethylene film
Correct answer: Woven polypropylene with latex coating
Woven polypropylene primary backing coated with latex is standard practice, providing dimensional stability and locking turf fibers in place.
Question 3: When selecting infill for a field located in a hot, sun-exposed climate, which alternative infill best reduces surface temperature compared to crumb rubber?
- Silica sand
- Thermoplastic elastomer (TPE) (Correct answer)
- Coated cork
- Expanded clay aggregate
Correct answer: Thermoplastic elastomer (TPE)
Thermoplastic elastomer (TPE) infill absorbs and retains significantly less heat than crumb rubber, reducing synthetic turf surface temperatures.
Question 4: A field builder is evaluating stone base materials. Which property is most critical for long-term base stability under heavy traffic loads?
- Carbonate content
- Angularity and particle shape (Correct answer)
- Color and aesthetics
- Moisture absorption rate
Correct answer: Angularity and particle shape
Angularity and particle shape determine how aggregate particles interlock, which is critical for resisting deformation under heavy traffic loads.
Question 5: Which standard governs the minimum shock absorption (Gmax) requirements for synthetic turf used in US football fields?
- ASTM F1936
- ASTM F355 (Correct answer)
- ASTM F1632
- FIFA TM 97
Correct answer: ASTM F355
ASTM F355 is the standard test method for shock-absorbing properties of playing surface systems and materials, used to measure Gmax on synthetic turf.
Question 6: A field builder is selecting edging materials for a synthetic turf installation. What is the primary purpose of a concrete nailer board?
- Provide drainage at field perimeter
- Anchor turf edges and prevent lifting (Correct answer)
- Improve aesthetics at the boundary
- Allow thermal expansion of the turf system
Correct answer: Anchor turf edges and prevent lifting
Concrete nailer boards anchor the turf edges securely, preventing lifting, fraying, or displacement at the field perimeter.
Question 7: Which seam tape material provides the strongest bond and best durability for synthetic turf field seams?
- Single-sided cloth tape
- Polyurethane-coated woven seam tape (Correct answer)
- Duct tape
- Double-sided foam tape
Correct answer: Polyurethane-coated woven seam tape
Polyurethane-coated woven seam tape provides superior bond strength, flexibility, and resistance to moisture and UV degradation at turf seams.
CFB Materials Selection 3
A field builder must select turf fiber pile height for a soccer-specific synthetic field.
What range is typically specified by FIFA Quality Programme standards?