LARE LARE Irrigation Design

Question 1

What is the primary purpose of a pressure vacuum breaker (PVB) in a landscape irrigation system?

Accepted Answer

To prevent backflow contamination of the potable water supply

Answer

To increase water pressure at the heads

Answer

To filter debris from the water supply

Answer

To regulate flow rate to each zone

Question 2

Which irrigation head type is most appropriate for large, open turf areas?

Accepted Answer

Rotor heads

Answer

Drip emitters

Answer

Pop-up spray heads

Answer

Bubbler heads

Question 3

What does 'precipitation rate' refer to in landscape irrigation design?

Accepted Answer

The rate at which irrigation heads apply water to an area, measured in inches per hour

Answer

The amount of natural rainfall expected per year at a site

Answer

The percentage of applied water absorbed by plant roots

Answer

The speed at which water moves through the soil profile

Question 4

What is the typical operating pressure range for standard pop-up spray heads?

Accepted Answer

30–45 PSI

Answer

5–15 PSI

Answer

60–80 PSI

Answer

100–120 PSI

Question 5

Which soil texture has the highest water infiltration rate?

Accepted Answer

Sand

Answer

Clay

Answer

Silt

Answer

Sandy loam

Question 6

What is the primary purpose of a master valve in an irrigation system?

Accepted Answer

To serve as a main supply shutoff that closes whenever the controller is not actively running a zone

Answer

To individually control each irrigation zone

Answer

To boost static water pressure throughout the system

Answer

To filter sediment from the water supply line

Question 7

Which irrigation scheduling approach uses real-time or historical weather data to calculate plant water demand?

Accepted Answer

Evapotranspiration (ET)-based scheduling

Answer

Calendar-based scheduling

Answer

Fixed-interval scheduling

Answer

Soil-texture-based scheduling