Landscape Design Irrigation and Water Management 1

Question 1

What type of irrigation system delivers water directly to the root zone to minimize evaporation and overspray?

Accepted Answer

Drip irrigation

Answer

Drip irrigation uses emitters placed at the root zone to deliver water slowly and directly, reducing evaporation, runoff, and disease from wet foliage.

Question 2

What is a backflow preventer in an irrigation system?

Accepted Answer

Device that prevents irrigation water from flowing back into the potable water supply

Answer

A backflow preventer is a required safety device that prevents contaminated irrigation water from siphoning back into the domestic drinking water supply.

Question 3

Which irrigation head type is best suited for large turf areas due to its long throw radius?

Accepted Answer

Rotor head

Answer

Rotor heads rotate and throw water in a stream pattern over distances of 15 to 50 feet, making them ideal for large turf and open areas.

Question 4

What does precipitation rate mean in the context of irrigation design?

Accepted Answer

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

Answer

Precipitation rate is the depth of water applied by an irrigation system per unit time, which must match the soil's infiltration rate to prevent runoff.

Question 5

What is the matched precipitation rate (MPR) principle in irrigation design?

Accepted Answer

All heads in a zone deliver the same precipitation rate regardless of arc

Answer

MPR nozzles ensure that quarter, half, and full circle heads in the same zone deliver water at the same rate per square foot, preventing over and under watering.

Landscape Design Practice Test

Landscape Design Practice Test

Landscape Design Irrigation and Water Management 1