CHT Irrigation & Water Management 3

Question 1

What is the recommended practice when winterizing an irrigation system in a cold climate?

Accepted Answer

Blow out all water using compressed air

Answer

Winterizing involves blowing out irrigation lines with compressed air to remove all water and prevent pipe and head damage from freezing.

Question 2

An irrigation audit involves:

Accepted Answer

Measuring precipitation rate and uniformity of an irrigation system

Answer

An irrigation audit measures how much water a system applies and how uniformly, using catch cans or other methods to assess system efficiency.

Question 3

Which material is most commonly used for modern residential irrigation mainlines?

Accepted Answer

PVC (polyvinyl chloride)

Answer

PVC pipe is the standard material for residential irrigation mainlines due to its affordability, durability, and ease of installation.

Question 4

What is the purpose of a pressure regulator in a drip irrigation system?

Accepted Answer

Reduce pressure to a level safe for drip components

Answer

Drip systems require low pressure (typically 15–30 PSI); pressure regulators reduce incoming line pressure to prevent blowing apart emitters or fittings.

Question 5

Gray water reuse in landscape irrigation refers to:

Accepted Answer

Recycling household sink and laundry water for irrigation

Answer

Gray water is lightly used household water from sinks, showers, and laundry that can be redirected to irrigate non-edible landscape plants after basic treatment.

CHT - Certified Horticultural Technician Practice Test

CHT - Certified Horticultural Technician Practice Test

CHT Irrigation & Water Management 3