CFB Construction Techniques 5

Question 1

When installing subsurface drainage pipe on a large athletic field, what is the minimum recommended grade for the pipe to ensure effective flow?

Accepted Answer

0.5%

Answer

A minimum slope of 0.5% (1:200) in drainage pipe is generally required to maintain adequate flow velocity and prevent sediment deposition in the pipe.

Question 2

What quality control test is used to verify the permeability of a sand-based root zone before installation?

Accepted Answer

Saturated hydraulic conductivity test

Answer

The saturated hydraulic conductivity test measures how quickly water moves through the root zone material, ensuring it meets design drainage rate specifications.

Question 3

In synthetic turf field construction, what is 'infill' and what is its primary role?

Accepted Answer

Rubber or sand granules added between turf fibers to support blades and provide resilience

Answer

Infill material fills the space between the turf fibers, keeping them upright, providing cushioning, and giving the field its performance and safety characteristics.

Question 4

What is the primary concern when constructing a sports field in an area with expansive (shrink-swell) clay soils?

Accepted Answer

Moisture changes cause significant volume changes that crack and heave the surface

Answer

Expansive clays absorb water and swell, then dry and shrink, creating differential movement that cracks pavements, distorts grades, and damages drainage systems.

Question 5

When marking field lines on a natural grass surface, what type of marking material is the current standard for most athletic fields?

Accepted Answer

Aerosol chalk paint or water-based athletic field marking paint

Answer

Water-based athletic field marking paints applied by striper machines are the current standard, offering safe, non-burning, and durable lines on natural turf.

(CFB) Certified Field Builder Practice Test

(CFB) Certified Field Builder Practice Test

CFB Construction Techniques 5