Texas Irriga on Technician Exam/ Exam prac ce test for
Texas Irrigator License 2025/2026 NEW!!
Who composes the Irrigator Council? - Ans 6 Irrigators, 3 Public members, all from the same
state
What is the purpose of the Irrigator Council? - Ans Provide advice on ma ers concerning
irriga on
Possible consequence of installing a system w/o a license? - Ans Being charged with a Class C
misdemeanor
Absorp on Rate - Ans Absorp on Rate: How fast a rate at which the soil will accept water
Actual Head Pressure - Ans The opera ng pressure measured at the base of a sprinkler head
How to CALCULATE Actual head pressure? - Ans subtract all pressure losses from sta c pressure
air gap - Ans A complete physical separa on between the free flowing discharge end of a
potable water supply pipeline and an open or non-pressure recieveing vessel
Applica on Rate - Ans Rate that a head applies water to the area it's spraying
What term is Applica on rate synonymous with? - Ans Precipita on Rate
Arc - Ans The surface area of the landscape that the head will provide water (half, full, 90, 25)
, as-built plans - Ans A corrected or redrawn plan, showing loca on of all major components of a
system
A.W.W.A. - Ans American Water Works Associa on
Backflow - Ans The UNDESIREABLE reverse flow of water in a piping system
Back pressure - Ans Condi on that can happen due to eleva on pumps, pressure
Back siphonage - Ans backflow due to a sub atomic pressure (break in city main, fire hydrant
being used
Backflow preven on - Ans A mechanical means to prevent a backflow
A backflow device - Ans Any approved device that prevents an undesireable reversal of flow of
water
1 column foot of water - Ans .443 psi (pre y close to 5 >.
1 psi - Ans requires a column of water 2.31 feet tall (or 3 >.) (or 27.75 in.)
max flowrate for 1/2 in pipe (to stay below 5 fps) - Ans 5 gpm
max flowrate for 3/4 in pipe (to stay below 5 fps) - Ans 10 gpm
max flowrate for 1 in pipe (to stay below 5 fps) - Ans 15 gpm
, max flowrate 1 1/4 in. pipe (to stay below 5 fps) - Ans 25 gpm
max flowrate for 1 1/2 in pipe (to stay below 5 fps) - Ans 35 gpm
Exam prac ce test for Texas Irrigator License
Gear rotor model B
Spray with X nozzle
Spray with Y nozzle
Spray with Z nozzle
1" valve model Q
Backflow device
Mainline pipe
Laterals pipe
House service pipe
Sleeves
City main pipe
City meter
Controller
Legend
To convert psi to feet
Mul ply by 2.31
To convert feet to psi
Mul ply by 0.433 psi
Precipita on Rate Formula
GPM (Full Circle Head) X 96.3
-------------- = PR
Head Spacing X Row Spacing (Divide)
Precipita on Rate for Drip
Texas Irrigator License 2025/2026 NEW!!
Who composes the Irrigator Council? - Ans 6 Irrigators, 3 Public members, all from the same
state
What is the purpose of the Irrigator Council? - Ans Provide advice on ma ers concerning
irriga on
Possible consequence of installing a system w/o a license? - Ans Being charged with a Class C
misdemeanor
Absorp on Rate - Ans Absorp on Rate: How fast a rate at which the soil will accept water
Actual Head Pressure - Ans The opera ng pressure measured at the base of a sprinkler head
How to CALCULATE Actual head pressure? - Ans subtract all pressure losses from sta c pressure
air gap - Ans A complete physical separa on between the free flowing discharge end of a
potable water supply pipeline and an open or non-pressure recieveing vessel
Applica on Rate - Ans Rate that a head applies water to the area it's spraying
What term is Applica on rate synonymous with? - Ans Precipita on Rate
Arc - Ans The surface area of the landscape that the head will provide water (half, full, 90, 25)
, as-built plans - Ans A corrected or redrawn plan, showing loca on of all major components of a
system
A.W.W.A. - Ans American Water Works Associa on
Backflow - Ans The UNDESIREABLE reverse flow of water in a piping system
Back pressure - Ans Condi on that can happen due to eleva on pumps, pressure
Back siphonage - Ans backflow due to a sub atomic pressure (break in city main, fire hydrant
being used
Backflow preven on - Ans A mechanical means to prevent a backflow
A backflow device - Ans Any approved device that prevents an undesireable reversal of flow of
water
1 column foot of water - Ans .443 psi (pre y close to 5 >.
1 psi - Ans requires a column of water 2.31 feet tall (or 3 >.) (or 27.75 in.)
max flowrate for 1/2 in pipe (to stay below 5 fps) - Ans 5 gpm
max flowrate for 3/4 in pipe (to stay below 5 fps) - Ans 10 gpm
max flowrate for 1 in pipe (to stay below 5 fps) - Ans 15 gpm
, max flowrate 1 1/4 in. pipe (to stay below 5 fps) - Ans 25 gpm
max flowrate for 1 1/2 in pipe (to stay below 5 fps) - Ans 35 gpm
Exam prac ce test for Texas Irrigator License
Gear rotor model B
Spray with X nozzle
Spray with Y nozzle
Spray with Z nozzle
1" valve model Q
Backflow device
Mainline pipe
Laterals pipe
House service pipe
Sleeves
City main pipe
City meter
Controller
Legend
To convert psi to feet
Mul ply by 2.31
To convert feet to psi
Mul ply by 0.433 psi
Precipita on Rate Formula
GPM (Full Circle Head) X 96.3
-------------- = PR
Head Spacing X Row Spacing (Divide)
Precipita on Rate for Drip
