TEXAS IRRIGATION TECHNICIAN EXAM
2025 QUESTIONS AND ANSWERS (VERIFIED
ANSWERS)
Who composes the Irrigator Council? - ANSWER-6 Irrigators, 3 Public
members, all from the same state
What is the purpose of the Irrigator Council? - ANSWER-Provide advice
on matters concerning irrigation
Possible consequence of installing a system w/o a license? - ANSWER-
Being charged with a Class C misdemeanor
Absorption Rate - ANSWER-How fast a rate at which the soil will accept
water
Actual Head Pressure - ANSWER-The operating pressure measured at
the base of a sprinkler head
How to CALCULATE Actual head pressure? - ANSWER-subtract all
pressure losses from static pressure
air gap - ANSWER-A complete physical separation between the free
flowing discharge end of a potable water supply pipeline and an open or
non-pressure recieveing vessel
Application Rate - ANSWER-Rate that a head applies water to the area
it's spraying
What term is Application rate synonymous with? - ANSWER-
Precipitation Rate
Arc - ANSWER-The surface area of the landscape that the head will
provide water (half, full, 90, 25)
as-built plans - ANSWER-A corrected or redrawn plan, showing location
of all major components of a system
, A.W.W.A. - ANSWER-American Water Works Association
Backflow - ANSWER-The UNDESIREABLE reverse flow of water in a piping
system
Back pressure - ANSWER-Condition that can happen due to elevation
pumps, pressure
Back siphonage - ANSWER-backflow due to a sub atomic pressure (break
in city main, fire hydrant being used
Backflow prevention - ANSWER-A mechanical means to prevent a
backflow
A backflow device - ANSWER-Any approved device that prevents an
undesireable reversal of flow of water
1 column foot of water - ANSWER-.443 psi (pretty close to 5 ft.
1 psi - ANSWER-requires a column of water 2.31 feet tall (or 3 ft.) (or
27.75 in.)
max flowrate for 1/2 in pipe (to stay below 5 fps) - ANSWER-5 gpm
max flowrate for 3/4 in pipe (to stay below 5 fps) - ANSWER-10 gpm
max flowrate for 1 in pipe (to stay below 5 fps) - ANSWER-15 gpm
max flowrate 1 1/4 in. pipe (to stay below 5 fps) - ANSWER-25 gpm
max flowrate for 1 1/2 in pipe (to stay below 5 fps) - ANSWER-35 gpm
Key requirement for RPZ backflow - ANSWER-minimum of 12" above
grade
Key requirement for Double Check backflow (DCVA) - ANSWER-If
installed below grade, Test cocks must be plugged with non-ferrous
(non-magnetic) material
2025 QUESTIONS AND ANSWERS (VERIFIED
ANSWERS)
Who composes the Irrigator Council? - ANSWER-6 Irrigators, 3 Public
members, all from the same state
What is the purpose of the Irrigator Council? - ANSWER-Provide advice
on matters concerning irrigation
Possible consequence of installing a system w/o a license? - ANSWER-
Being charged with a Class C misdemeanor
Absorption Rate - ANSWER-How fast a rate at which the soil will accept
water
Actual Head Pressure - ANSWER-The operating pressure measured at
the base of a sprinkler head
How to CALCULATE Actual head pressure? - ANSWER-subtract all
pressure losses from static pressure
air gap - ANSWER-A complete physical separation between the free
flowing discharge end of a potable water supply pipeline and an open or
non-pressure recieveing vessel
Application Rate - ANSWER-Rate that a head applies water to the area
it's spraying
What term is Application rate synonymous with? - ANSWER-
Precipitation Rate
Arc - ANSWER-The surface area of the landscape that the head will
provide water (half, full, 90, 25)
as-built plans - ANSWER-A corrected or redrawn plan, showing location
of all major components of a system
, A.W.W.A. - ANSWER-American Water Works Association
Backflow - ANSWER-The UNDESIREABLE reverse flow of water in a piping
system
Back pressure - ANSWER-Condition that can happen due to elevation
pumps, pressure
Back siphonage - ANSWER-backflow due to a sub atomic pressure (break
in city main, fire hydrant being used
Backflow prevention - ANSWER-A mechanical means to prevent a
backflow
A backflow device - ANSWER-Any approved device that prevents an
undesireable reversal of flow of water
1 column foot of water - ANSWER-.443 psi (pretty close to 5 ft.
1 psi - ANSWER-requires a column of water 2.31 feet tall (or 3 ft.) (or
27.75 in.)
max flowrate for 1/2 in pipe (to stay below 5 fps) - ANSWER-5 gpm
max flowrate for 3/4 in pipe (to stay below 5 fps) - ANSWER-10 gpm
max flowrate for 1 in pipe (to stay below 5 fps) - ANSWER-15 gpm
max flowrate 1 1/4 in. pipe (to stay below 5 fps) - ANSWER-25 gpm
max flowrate for 1 1/2 in pipe (to stay below 5 fps) - ANSWER-35 gpm
Key requirement for RPZ backflow - ANSWER-minimum of 12" above
grade
Key requirement for Double Check backflow (DCVA) - ANSWER-If
installed below grade, Test cocks must be plugged with non-ferrous
(non-magnetic) material
