CPP CPP Irrigation & Water Management

Question 1

Which irrigation method delivers water directly to the root zone and is most efficient for landscape plants in arid US regions?

Accepted Answer

Drip irrigation

Answer

Flood irrigation

Answer

Overhead sprinkler

Answer

Furrow irrigation

Question 2

What is the term for the amount of water lost from soil and plant surfaces combined, used to calculate irrigation scheduling?

Accepted Answer

Evapotranspiration (ET)

Answer

Transpiration

Answer

Evaporation

Answer

Percolation

Question 3

A plant's water requirement is best described by which coefficient when adjusting reference ET for landscape use?

Accepted Answer

Crop coefficient (Kc)

Answer

Manning's coefficient

Answer

Irrigation efficiency factor

Answer

Field capacity index

Question 4

Which soil property most directly determines how quickly irrigation water infiltrates and moves through the profile?

Accepted Answer

Soil texture and structure

Answer

Soil pH

Answer

Organic matter content

Answer

Cation exchange capacity

Question 5

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

Accepted Answer

Consistency of water application across the irrigated area

Answer

Total water applied per cycle

Answer

Pressure at the system head

Answer

Number of emitters per zone

Question 6

Which backflow prevention device is required by most US codes when an irrigation system is connected to a potable water supply?

Accepted Answer

Pressure vacuum breaker (PVB) or reduced-pressure zone (RPZ) device

Answer

Gate valve

Answer

Ball valve

Answer

Check valve only