Texas Landscape Irrigation Exam
Questions and Answers
Pressure compensating devices help save water because they? - Correct Answers -
Help eliminate misting or fogging at the sprinkler heads
Landscape Irrigation - Correct 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 - Correct 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 - Correct Answers -Devices which eliminate misting or
fogging at the sprinkler heads, thus achieving better uniformity and saving water
Hydrozoning - Correct 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 - Correct 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 - Correct Answers -The speed at which water can penetrate or infiltrate
the soil
Actual Head Pressure - Correct Answers -The operating pressure measured at the base
of a sprinkler head.
What does PVC 1220 stand for? - Correct Answers -Type 1, Grade 2, 2000PSI
hydrostatic design stress
What types of copper are available? - Correct Answers -K,L, and M
What type of copper has the heaviest wall thickness? - Correct Answers -K
, What is the C factor reference in piping? - Correct Answers -How smooth the inside of
the pipe is
Multiple start times help prevent or control? - Correct Answers -Run-off
What does the water budget controller feature do? - Correct Answers -Allows for
increase or decrease in run times by percentage to help regulate and save water
Actual head pressure formula - Correct Answers -(Static pressure) - (Total pressure
lost) = Actual head pressure
air gap - Correct 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? - Correct Answers -Kitchen sink
Application Rate (Precipitation rate) - Correct Answers -Rate at which water is applied
by sprinkler heads in a certain pattern.
For irrigation contractors, water conservation starts with? - Correct Answers -A great
design
Three methods to evaluate application rate - Correct Answers -Densogram,
Precipitation rate formulas, Water audit
The proper watering time is early morning because? - Correct Answers -Sprinkler
patterns are generally less distorted from the wind
arc - Correct 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? - Correct Answers -Landscape
Irrigation
Atmospheric Vacuum Breaker (AVB) - Correct 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.
Questions and Answers
Pressure compensating devices help save water because they? - Correct Answers -
Help eliminate misting or fogging at the sprinkler heads
Landscape Irrigation - Correct 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 - Correct 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 - Correct Answers -Devices which eliminate misting or
fogging at the sprinkler heads, thus achieving better uniformity and saving water
Hydrozoning - Correct 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 - Correct 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 - Correct Answers -The speed at which water can penetrate or infiltrate
the soil
Actual Head Pressure - Correct Answers -The operating pressure measured at the base
of a sprinkler head.
What does PVC 1220 stand for? - Correct Answers -Type 1, Grade 2, 2000PSI
hydrostatic design stress
What types of copper are available? - Correct Answers -K,L, and M
What type of copper has the heaviest wall thickness? - Correct Answers -K
, What is the C factor reference in piping? - Correct Answers -How smooth the inside of
the pipe is
Multiple start times help prevent or control? - Correct Answers -Run-off
What does the water budget controller feature do? - Correct Answers -Allows for
increase or decrease in run times by percentage to help regulate and save water
Actual head pressure formula - Correct Answers -(Static pressure) - (Total pressure
lost) = Actual head pressure
air gap - Correct 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? - Correct Answers -Kitchen sink
Application Rate (Precipitation rate) - Correct Answers -Rate at which water is applied
by sprinkler heads in a certain pattern.
For irrigation contractors, water conservation starts with? - Correct Answers -A great
design
Three methods to evaluate application rate - Correct Answers -Densogram,
Precipitation rate formulas, Water audit
The proper watering time is early morning because? - Correct Answers -Sprinkler
patterns are generally less distorted from the wind
arc - Correct 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? - Correct Answers -Landscape
Irrigation
Atmospheric Vacuum Breaker (AVB) - Correct 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.
