IA Irrigation Controllers & Automation

Question 1

What is the primary function of an irrigation controller?

Accepted Answer

To automatically open and close valves according to a programmed schedule

Answer

To filter sediment from irrigation water

Answer

To regulate mainline water pressure

Answer

To measure soil nutrient levels

Question 2

A rain sensor on an irrigation controller is designed to:

Accepted Answer

Interrupt or delay scheduled irrigation when sufficient rainfall occurs

Answer

Measure soil moisture levels

Answer

Increase run times during dry weather

Answer

Alert the controller to low-pressure conditions

Question 3

A two-wire decoder irrigation system differs from a conventional controller system because:

Accepted Answer

It runs all field wiring from the controller through a single pair of wires to decoder modules at each valve

Answer

It uses wireless radio signals only

Answer

It requires no controller at all

Answer

It uses higher voltage to power the solenoid valves

Question 4

Which controller feature allows a user to temporarily increase or decrease all run times by a percentage without reprogramming each zone?

Accepted Answer

Seasonal adjust (water budget) percentage

Answer

Station delay feature

Answer

Master valve override

Answer

Rain delay setting

Question 5

A master valve (MV) in an irrigation system is installed:

Accepted Answer

On the mainline upstream of all zone valves, and opens only when a station is active

Answer

At each sprinkler head

Answer

Inside the controller cabinet

Answer

At the well pump discharge

Question 6

What type of sensor can be wired to a controller's sensor input to automatically suspend irrigation when the soil has sufficient moisture?

Accepted Answer

Soil moisture sensor (tensiometer or capacitance probe)

Answer

Anemometer

Answer

Flow meter

Answer

UV sensor