©THESTAR EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Texas Landscape Irrigation Exam Questions
With Verified Answers
Pressure compensating devices help save water because they? - Answers✔Help eliminate
misting or fogging at the sprinkler heads
Landscape Irrigation - Answers✔The art and management of applying water to landscape in a
manner to encourage growth of plant material and support water conservation
Irrigation sensors - Answers✔(Measure rain, wind, soil moisture, and freeze) that save water and
eliminate liability issues concerning ice related accidents during freeing weather
Pressure Regulation Device - Answers✔Devices which eliminate misting or fogging at the
sprinkler heads, thus achieving better uniformity and saving water
Hydrozoning - Answers✔The practice of zoning an irrigation system based on similar plant
material with similar watering reguirements due to environmental and or geographic influences
including, but not limited to, soil type, slope, site orientation, and solar radiation
Licensed landscape irrigators - Answers✔Responsibility to educate, promote, support and
practice water conservation in the landscape irrigation industry in order to preserve one of out
most precious resources on earth
Absorption Rate - Answers✔The speed at which water can penetrate or infiltrate the soil
Actual Head Pressure - Answers✔The operating pressure measured at the base of a sprinkler
head.
Actual head pressure formula - Answers✔(Static pressure) - (Total pressure lost) = Actual head
pressure
air gap - Answers✔an approved Air gap is the unobstructed vertical distance through free
atmosphere between the lowest point of a water supply outlet and the flood level rim of the
fixture or assembly into which the outlet discharges. Physical seperation must be at least twice
the diameter of the water supply outlet but never less than 1"
Most common air gap? - Answers✔Kitchen sink
, ©THESTAR EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Application Rate (Precipitation rate) - Answers✔Rate at which water is applied by sprinkler
heads in a certain pattern.
For irrigation contractors, water conservation starts with? - Answers✔A great design
Three methods to evaluate application rate - Answers✔Densogram, Precipitation rate formulas,
Water audit
The proper watering time is early morning because? - Answers✔Sprinkler patterns are generally
less distorted from the wind
arc - Answers✔Degrees of coverage of a sprinkler from one side of a pattern to the other
The art and management of applying water to the landscape to encourage the growth of plant
material and support water conservation is? - Answers✔Landscape Irrigation
Atmospheric Vacuum Breaker (AVB) - Answers✔Backflow prevention device that allows air
into the piping system, with the use of a float that moves up and down, to prevent
backsiphonage.
Cannot be under constant pressure for more than 12 hours in one 24 hour window.
A minimum of 6" higher than all down stream piping.
A separate AVB must be installed on the discharge side of each control valve, between the valve
and all emission devices.
Automatic control valve - Answers✔An electrical or hydraulic remote control valve in a
sprinkler system which is activated by an automatic controller
Backflow - Answers✔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 - Answers✔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.
Backsiphonage - Answers✔A form of backflow due to negative or sub-atmospheric pressure
within water system.
Backflow prevention methods - Answers✔Any approved device which prevents an undesirable
reversal of flow of water by the introduction of air, check valves, or a combination of both.
Backflow prevention devices - Answers✔Air Gap
Atmospheric Vacuum Breaker (AVB)
Pressure Vacuum Breaker (PVB)
Double Check Valve Assembly (DCA)
ALL RIGHTS RESERVED.
Texas Landscape Irrigation Exam Questions
With Verified Answers
Pressure compensating devices help save water because they? - Answers✔Help eliminate
misting or fogging at the sprinkler heads
Landscape Irrigation - Answers✔The art and management of applying water to landscape in a
manner to encourage growth of plant material and support water conservation
Irrigation sensors - Answers✔(Measure rain, wind, soil moisture, and freeze) that save water and
eliminate liability issues concerning ice related accidents during freeing weather
Pressure Regulation Device - Answers✔Devices which eliminate misting or fogging at the
sprinkler heads, thus achieving better uniformity and saving water
Hydrozoning - Answers✔The practice of zoning an irrigation system based on similar plant
material with similar watering reguirements due to environmental and or geographic influences
including, but not limited to, soil type, slope, site orientation, and solar radiation
Licensed landscape irrigators - Answers✔Responsibility to educate, promote, support and
practice water conservation in the landscape irrigation industry in order to preserve one of out
most precious resources on earth
Absorption Rate - Answers✔The speed at which water can penetrate or infiltrate the soil
Actual Head Pressure - Answers✔The operating pressure measured at the base of a sprinkler
head.
Actual head pressure formula - Answers✔(Static pressure) - (Total pressure lost) = Actual head
pressure
air gap - Answers✔an approved Air gap is the unobstructed vertical distance through free
atmosphere between the lowest point of a water supply outlet and the flood level rim of the
fixture or assembly into which the outlet discharges. Physical seperation must be at least twice
the diameter of the water supply outlet but never less than 1"
Most common air gap? - Answers✔Kitchen sink
, ©THESTAR EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Application Rate (Precipitation rate) - Answers✔Rate at which water is applied by sprinkler
heads in a certain pattern.
For irrigation contractors, water conservation starts with? - Answers✔A great design
Three methods to evaluate application rate - Answers✔Densogram, Precipitation rate formulas,
Water audit
The proper watering time is early morning because? - Answers✔Sprinkler patterns are generally
less distorted from the wind
arc - Answers✔Degrees of coverage of a sprinkler from one side of a pattern to the other
The art and management of applying water to the landscape to encourage the growth of plant
material and support water conservation is? - Answers✔Landscape Irrigation
Atmospheric Vacuum Breaker (AVB) - Answers✔Backflow prevention device that allows air
into the piping system, with the use of a float that moves up and down, to prevent
backsiphonage.
Cannot be under constant pressure for more than 12 hours in one 24 hour window.
A minimum of 6" higher than all down stream piping.
A separate AVB must be installed on the discharge side of each control valve, between the valve
and all emission devices.
Automatic control valve - Answers✔An electrical or hydraulic remote control valve in a
sprinkler system which is activated by an automatic controller
Backflow - Answers✔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 - Answers✔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.
Backsiphonage - Answers✔A form of backflow due to negative or sub-atmospheric pressure
within water system.
Backflow prevention methods - Answers✔Any approved device which prevents an undesirable
reversal of flow of water by the introduction of air, check valves, or a combination of both.
Backflow prevention devices - Answers✔Air Gap
Atmospheric Vacuum Breaker (AVB)
Pressure Vacuum Breaker (PVB)
Double Check Valve Assembly (DCA)
