CGM CGM Irrigation & Water Management

Question 1

What is the primary advantage of a smart irrigation controller over a traditional timer-based controller?

Accepted Answer

It automatically adjusts watering schedules based on weather and soil data to avoid overwatering

Answer

It costs less to install

Answer

It can only water at night

Answer

It eliminates the need for backflow preventers

Question 2

Which irrigation system type delivers water directly to the root zone of plants, minimizing evaporation losses?

Accepted Answer

Drip/micro-irrigation

Answer

Pop-up spray heads

Answer

Rotary sprinklers

Answer

Impact sprinklers

Question 3

What does evapotranspiration (ET) measure in the context of turfgrass irrigation?

Accepted Answer

The combined water loss from soil evaporation and plant transpiration

Answer

The rate of water absorption by soil

Answer

The speed of water movement through irrigation pipes

Answer

The amount of rainfall captured in reservoirs

Question 4

A backflow preventer on an irrigation system is required primarily to:

Accepted Answer

Prevent contaminated irrigation water from flowing back into the potable water supply

Answer

Increase water pressure

Answer

Filter sediment from sprinkler heads

Answer

Reduce water hammer in the main line

Question 5

What is the term for the percentage of water applied by an irrigation system that is actually used by the plant, expressed as a percent?

Accepted Answer

Irrigation efficiency

Answer

Precipitation rate

Answer

Distribution uniformity

Answer

Hydraulic conductivity

Question 6

Which factor most directly determines the correct spacing between sprinkler heads in a residential or commercial irrigation design?

Accepted Answer

The sprinkler's radius of throw and the head-to-head coverage principle

Answer

The color of the sprinkler body

Answer

The brand of the irrigation controller

Answer

The time of day watering will occur