7/13/25, 5:57
PM
TEXAS IRRIGATOR LICENSE STUDY GUIDE EXAM
ACTUAL QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED LATEST UPDATE
2025/2026
Terms in this set (92)
Absorption Rate/ The rate (or speed) at which soil will accept
Infiltration Rate water.
The operating pressure measured at the
base of a sprinkler head. It must be equal
Actual Head to or greater than minimum head
Pressure pressure to function correctly.
Formula: Static Pressure-Total Pressure Loss
Small device used on some drip irrigation
Air Relief Valve 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.
Rate at which water is applied by
sprinkler heads in a certain pattern.
Application Measure in inches per hours, gallons
1/
13
, 7/13/25, 5:57
PM
Rate/Precipitation per hours, or gallons per day.
Rate
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.
The surface area of the landscape to
which a sprinkler head will provide water.
Arc 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.
A corrected or redrawn plan showing
As-Built Plan 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.
A backflow prevention device that allows
Atmospheric Vacuum air into the piping system, with the use of
Breaker a float that moves up and down, to
prevent backsiphonage. This is no longer
2/
13
PM
TEXAS IRRIGATOR LICENSE STUDY GUIDE EXAM
ACTUAL QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED LATEST UPDATE
2025/2026
Terms in this set (92)
Absorption Rate/ The rate (or speed) at which soil will accept
Infiltration Rate water.
The operating pressure measured at the
base of a sprinkler head. It must be equal
Actual Head to or greater than minimum head
Pressure pressure to function correctly.
Formula: Static Pressure-Total Pressure Loss
Small device used on some drip irrigation
Air Relief Valve 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.
Rate at which water is applied by
sprinkler heads in a certain pattern.
Application Measure in inches per hours, gallons
1/
13
, 7/13/25, 5:57
PM
Rate/Precipitation per hours, or gallons per day.
Rate
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.
The surface area of the landscape to
which a sprinkler head will provide water.
Arc 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.
A corrected or redrawn plan showing
As-Built Plan 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.
A backflow prevention device that allows
Atmospheric Vacuum air into the piping system, with the use of
Breaker a float that moves up and down, to
prevent backsiphonage. This is no longer
2/
13
