CHT Irrigation & Water Management 1

Question 1

What is the primary advantage of drip irrigation over overhead sprinklers?

Accepted Answer

Delivers water directly to root zone with less evaporation

Answer

Drip irrigation delivers water slowly and directly to the root zone, minimizing evaporation losses and reducing foliar disease risk.

Question 2

Evapotranspiration (ET) data is used in irrigation scheduling to:

Accepted Answer

Estimate how much water plants use and need to replace

Answer

ET values quantify water lost through evaporation and plant transpiration, helping irrigators apply exactly the amount needed to maintain soil moisture.

Question 3

Which type of sprinkler head is best suited for large turf areas?

Accepted Answer

Rotary/rotor head

Answer

Rotary (rotor) heads rotate and throw water over large distances, making them efficient and cost-effective for large turf areas.

Question 4

Backflow prevention devices are required in irrigation systems to:

Accepted Answer

Prevent contaminated water from entering the potable supply

Answer

Backflow preventers stop irrigation water (which may contain fertilizers or pesticides) from flowing back into the public drinking water supply.

Question 5

What is 'hydraulic zoning' in irrigation design?

Accepted Answer

Dividing areas by plant water need and pressure requirements

Answer

Hydraulic zoning groups plants with similar water needs and designs zones based on flow rate and pressure to ensure uniform coverage.

CHT - Certified Horticultural Technician Practice Test

CHT - Certified Horticultural Technician Practice Test

CHT Irrigation & Water Management 1