C27 License Water Conservation and Drought-Tolerant Landscaping 2

Question 1

Which irrigation method provides the greatest water conservation in a drought-tolerant landscape?

Accepted Answer

Drip irrigation

Answer

Overhead spray sprinklers

Answer

Flood irrigation

Answer

Impact rotary heads

Question 2

What is the purpose of a rain sensor or weather-based controller in an irrigation system?

Accepted Answer

To automatically shut off irrigation during or after rainfall

Answer

To increase water pressure during dry periods

Answer

To detect underground pipe leaks

Answer

To control fertilizer injection rates

Question 3

Which type of turf grass requires the least supplemental water in California landscapes?

Accepted Answer

Buffalo grass or Bermuda grass

Answer

Kentucky Bluegrass

Answer

St. Augustine grass

Answer

Annual Ryegrass

Question 4

What does 'water budget' mean in the context of California landscape water regulations?

Accepted Answer

The maximum annual water allowance for a landscape based on local ET data

Answer

The contractor's estimated project cost

Answer

The monthly cost of water for irrigation

Answer

A financial reserve set aside for irrigation system repairs

Question 5

Which plants are most appropriate for drought-tolerant landscaping in California's climate?

Accepted Answer

Native and Mediterranean-climate plants

Answer

Tropical plants requiring frequent watering

Answer

Cool-season lawn grasses requiring daily irrigation

Answer

Annuals requiring frequent replanting

Question 6

What is the recommended soil amendment incorporation depth for turf removal and drought-tolerant replanting projects?

Accepted Answer

6 inches

Answer

2 inches

Answer

4 inches

Answer

12 inches