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