1|Page | © copyright 2024/2025 | Grade A+
Texas Irrigator License Study Guide
Questions and Answers (Rated
100%)
Absorption Rate/ Infiltration Rate
✓ The rate (or speed) at which soil will accept water.
Actual Head Pressure
✓ The operating pressure measured at the base of a sprinkler head. It
must be equal to or greater than minimum head pressure to function
correctly.
✓
✓ Formula: Static Pressure-Total Pressure Loss
Air Relief Valve
✓ Small device used on some drip irrigation that allows air into the dripline
when the system is not running which eliminates any vacuum that
could result in debris or contaminants being sucking into the line.
Application Rate/Precipitation Rate
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
✓ Rate at which water is applied by sprinkler heads in a certain pattern.
Measure in inches per hours, gallons per hours, or gallons per day.
✓
✓ Formula: 96.3 X Total GPM/ Total Area
Water Audit
✓ The most accurate method to evaluate precipitation rates. You will
collect water using catchment devices.
Arc
✓ The surface area of the landscape to which a sprinkler head will
provide water. Described in degrees or part of a full circle (360
degrees).
✓
✓ Example: a 90 degree arc would be a quarter circle head, a 180
degree arc would be a half circle head, a 360 degree arc would be a
full circle head.
As-Built Plan
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
✓ A corrected or redrawn plan showing the "actual scaled" location of all
major components of the system and other information the property
owner might require. Zone valves are the most important component
to locate.
Atmospheric Vacuum Breaker
✓ A backflow prevention device that allows air into the piping system,
with the use of a float that moves up and down, to prevent
backsiphonage. This is no longer allowed in Texas.
Backflow
✓ An unwanted reversal of the flow of water in a piping system which
can potentially allow non-potable water to pollute or contaminate the
potable water supply.
Backpressure
✓ Any condition that could create pressure in the discharge side of the
piping system that is greater than that of the supply side of the system.
This can because by gravity (due to elevation) or a pump.
Backsiphonage
Master01 | October, 2024/2025 | Latest update
Texas Irrigator License Study Guide
Questions and Answers (Rated
100%)
Absorption Rate/ Infiltration Rate
✓ The rate (or speed) at which soil will accept water.
Actual Head Pressure
✓ The operating pressure measured at the base of a sprinkler head. It
must be equal to or greater than minimum head pressure to function
correctly.
✓
✓ Formula: Static Pressure-Total Pressure Loss
Air Relief Valve
✓ Small device used on some drip irrigation that allows air into the dripline
when the system is not running which eliminates any vacuum that
could result in debris or contaminants being sucking into the line.
Application Rate/Precipitation Rate
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
✓ Rate at which water is applied by sprinkler heads in a certain pattern.
Measure in inches per hours, gallons per hours, or gallons per day.
✓
✓ Formula: 96.3 X Total GPM/ Total Area
Water Audit
✓ The most accurate method to evaluate precipitation rates. You will
collect water using catchment devices.
Arc
✓ The surface area of the landscape to which a sprinkler head will
provide water. Described in degrees or part of a full circle (360
degrees).
✓
✓ Example: a 90 degree arc would be a quarter circle head, a 180
degree arc would be a half circle head, a 360 degree arc would be a
full circle head.
As-Built Plan
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
✓ A corrected or redrawn plan showing the "actual scaled" location of all
major components of the system and other information the property
owner might require. Zone valves are the most important component
to locate.
Atmospheric Vacuum Breaker
✓ A backflow prevention device that allows air into the piping system,
with the use of a float that moves up and down, to prevent
backsiphonage. This is no longer allowed in Texas.
Backflow
✓ An unwanted reversal of the flow of water in a piping system which
can potentially allow non-potable water to pollute or contaminate the
potable water supply.
Backpressure
✓ Any condition that could create pressure in the discharge side of the
piping system that is greater than that of the supply side of the system.
This can because by gravity (due to elevation) or a pump.
Backsiphonage
Master01 | October, 2024/2025 | Latest update
