CFB CFB Drainage & Irrigation Systems 1

Question 1

What is the recommended minimum slope for surface drainage on a natural grass athletic field?

Accepted Answer

1.0%

Answer

A minimum 1.0% slope is recommended for natural grass athletic fields to ensure effective surface water runoff.

Question 2

Which type of subsurface drainage system uses perforated pipes installed in gravel-filled trenches beneath a field?

Accepted Answer

French drain system

Answer

A French drain system uses perforated pipes surrounded by gravel-filled trenches to collect and redirect subsurface water.

Question 3

What is the primary purpose of a rootzone drainage layer in a sand-based athletic field?

Accepted Answer

To allow rapid percolation of water away from the playing surface

Answer

The rootzone drainage layer in sand-based fields is designed to allow water to percolate quickly downward, keeping the surface playable.

Question 4

In athletic field irrigation design, what does 'distribution uniformity' (DU) measure?

Accepted Answer

The consistency of water application across the irrigated area

Answer

Distribution uniformity measures how evenly water is applied across an irrigation zone, with higher DU values indicating more consistent coverage.

Question 5

Which factor most directly determines the spacing between lateral drainage pipes in an athletic field?

Accepted Answer

The hydraulic conductivity of the soil

Answer

Soil hydraulic conductivity determines how quickly water moves laterally through the soil, which directly governs the required spacing between drainage pipes.

(CFB) Certified Field Builder Practice Test

(CFB) Certified Field Builder Practice Test

CFB CFB Drainage & Irrigation Systems 1