IA Sprinkler & Emitter Technology

Question 1

What does the term 'precipitation rate' mean for a sprinkler system?

Accepted Answer

The rate at which water is applied to the landscape, expressed in inches per hour

Answer

The operating pressure at the sprinkler head

Answer

The speed at which the sprinkler rotates

Answer

The number of gallons per minute delivered by the pump

Question 2

Which type of sprinkler head is best suited for large turf areas such as sports fields and golf courses?

Accepted Answer

Rotary or rotor head

Answer

Fixed spray head

Answer

Micro-spray head

Answer

Bubbler

Question 3

What is the primary advantage of drip irrigation over sprinkler irrigation for shrub beds?

Accepted Answer

Water is delivered directly to the root zone, reducing evaporation and foliar wetting

Answer

Higher precipitation rates

Answer

Lower installation cost

Answer

Greater throw radius

Question 4

A pressure-compensating (PC) drip emitter maintains a consistent flow rate over a pressure range typically of:

Accepted Answer

7–45 PSI

Answer

1–5 PSI

Answer

50–80 PSI

Answer

100–150 PSI

Question 5

Distribution uniformity (DU) for a sprinkler system is calculated using data from which type of field test?

Accepted Answer

Catch can test

Answer

Pressure gauge test

Answer

Soil probe test

Answer

Flow meter test

Question 6

What is the formula for calculating the precipitation rate (PR) of a sprinkler system?

Accepted Answer

PR = [96.3 × Flow (GPM)] / Area (sq ft)

Answer

PR = Flow (GPM) × Area (sq ft)

Answer

PR = Pressure (PSI) / Radius (ft)

Answer

PR = Nozzle size × Spacing