CFB CFB Drainage & Irrigation Systems 2

Question 1

What type of irrigation head is most commonly used on natural grass athletic fields for its uniform coverage pattern?

Accepted Answer

Pop-up rotary heads

Answer

Pop-up rotary heads are preferred for athletic fields because they provide uniform coverage over large areas while remaining flush with the surface when not in use.

Question 2

Which backflow prevention device is typically required by US plumbing codes for athletic field irrigation systems connected to a potable water supply?

Accepted Answer

Pressure vacuum breaker (PVB)

Answer

A pressure vacuum breaker (PVB) is commonly required by US codes to prevent contaminated irrigation water from flowing back into potable water supplies.

Question 3

What does 'ET-based' irrigation scheduling mean in the context of athletic field management?

Accepted Answer

Applying water to replace the amount lost through evapotranspiration

Answer

ET-based scheduling replaces only the water lost through evapotranspiration, matching irrigation input to actual plant water use for efficiency.

Question 4

In a catch-can test for an athletic field irrigation system, what is the acceptable coefficient of uniformity (CU) for a well-designed system?

Accepted Answer

Above 85%

Answer

A coefficient of uniformity above 85% is considered acceptable for a well-designed and functioning athletic field irrigation system.

Question 5

What is the primary purpose of check valves installed within pop-up irrigation heads on sloped athletic fields?

Accepted Answer

To prevent low-head drainage after irrigation cycles

Answer

Check valves in irrigation heads on sloped fields prevent water from draining out of lower-elevation heads after the system shuts off, avoiding puddling and wasted water.

(CFB) Certified Field Builder Practice Test

(CFB) Certified Field Builder Practice Test

CFB CFB Drainage & Irrigation Systems 2