LARE LARE Irrigation Design 2

Question 1

What does 'matched precipitation rate' (MPR) technology accomplish in an irrigation zone?

Accepted Answer

It ensures that quarter-, half-, and full-circle heads in the same zone all apply water at the same rate

Answer

It matches the irrigation rate to the site's annual rainfall amount

Answer

It calculates precipitation rate relative to soil texture

Answer

It sets the controller runtime to match forecasted weather

Question 2

What is the function of a pressure-compensating emitter in a drip irrigation system?

Accepted Answer

It maintains a consistent flow rate across a wide range of operating pressures

Answer

It prevents backflow into the potable supply

Answer

It filters particles from the water before distribution

Answer

It automatically flushes debris from the end of the lateral

Question 3

What term describes the combined water loss from soil evaporation and plant transpiration?

Accepted Answer

Evapotranspiration (ET)

Answer

Percolation

Answer

Runoff coefficient

Answer

Infiltration rate

Question 4

What is the purpose of a check valve built into rotor and spray heads?

Accepted Answer

To prevent low-head drainage after the zone valve closes on sloped sites

Answer

To increase static pressure at the head

Answer

To filter debris before it reaches the nozzle

Answer

To limit the arc of rotation to a preset angle

Question 5

Which irrigation method is generally the most water-efficient for trees and shrubs in a landscape?

Accepted Answer

Subsurface drip irrigation

Answer

Overhead spray system

Answer

Gear-driven rotor system

Answer

Above-ground bubbler system

Question 6

What does 'distribution uniformity' (DU) measure in an irrigation system?

Accepted Answer

How evenly water is applied across all parts of an irrigated area

Answer

The equal spacing of heads across a zone layout

Answer

The uniformity of operating pressure throughout the system

Answer

The consistency of pipe diameters used in the design

Question 7

In irrigation design, what is 'hydrozoning'?

Accepted Answer

Grouping plants with similar water requirements into the same irrigation zone

Answer

Creating separate water meters for each irrigation zone

Answer

Designing dedicated irrigation circuits for water features only

Answer

Installing pressure regulation at different site elevations