TEXAS LANDSCAPE IRRIGATION
QUESTIONS AND ANSWERS
Hydrozoning ✅✅correct answ-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 answ-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 answ-The speed at which water can penetrate or infiltrate the soil
Actual Head Pressure ✅✅correct answ-The operating pressure measured at the base of a
sprinkler head.
Actual head pressure formula ✅✅correct answ-(Static pressure) - (Total pressure lost) = Actual
head pressure
air gap ✅✅correct answ-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 answ-Kitchen sink
Application Rate (Precipitation rate) ✅✅correct answ-Rate at which water is applied by sprinkler
heads in a certain pattern.
For irrigation contractors, water conservation starts with? ✅✅correct answ-A great design
Three methods to evaluate application rate ✅✅correct answ-Densogram, Precipitation rate
formulas, Water audit
,The proper watering time is early morning because? ✅✅correct answ-Sprinkler patterns are
generally less distorted from the wind
arc ✅✅correct answ-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 answ-Landscape Irrigation
Pressure compensating devices help save water because they? ✅✅correct answ-Help eliminate
misting or fogging at the sprinkler heads
Landscape Irrigation ✅✅correct answ-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 answ-(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 answ-Devices which eliminate misting or fogging at the
sprinkler heads, thus achieving better uniformity and saving water
Atmospheric Vacuum Breaker (AVB) ✅✅correct answ-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 ✅✅correct answ-An electrical or hydraulic remote control valve in a
sprinkler system which is activated by an automatic controller
Backflow ✅✅correct answ-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 ✅✅correct answ-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 ✅✅correct answ-A form of backflow due to negative or sub-atmospheric pressure
within water system.
Backflow prevention methods ✅✅correct answ-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 ✅✅correct answ-Air Gap
Atmospheric Vacuum Breaker (AVB)
Pressure Vacuum Breaker (PVB)
Double Check Valve Assembly (DCA)
Reduced Pressure Prevention Device (RP)
Ball Driven Heads ✅✅correct answ-Rotary sprinkler in which roatation is achieved by a steel ball
which is set into a circular motion by water passing through the head
Bubblers ✅✅correct answ-Similar to drip emitters except that they have a much higher flow rate
Flood a small area and the water continues to infiltrate into the soil after the bubbler has been
shutoff.
Applicable in areas where small basins can be constructed to contain the water and where the soil is
surface is level.
Bushing ✅✅correct answ-The pipe fitting used to change an irrigation component to a larger or
smaller size
C-factor ✅✅correct answ-Rating the smoothness inside of the pipe - higher the factor translates
to more smoothness
Check Valve ✅✅correct answ-A valve that allows flow in one direction only
Class Pipe ✅✅correct answ-Four classes used for piping and fittings receiving used water from
buildings. (Class 125-160-200-315)
Class 200 being the most common
QUESTIONS AND ANSWERS
Hydrozoning ✅✅correct answ-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 answ-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 answ-The speed at which water can penetrate or infiltrate the soil
Actual Head Pressure ✅✅correct answ-The operating pressure measured at the base of a
sprinkler head.
Actual head pressure formula ✅✅correct answ-(Static pressure) - (Total pressure lost) = Actual
head pressure
air gap ✅✅correct answ-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 answ-Kitchen sink
Application Rate (Precipitation rate) ✅✅correct answ-Rate at which water is applied by sprinkler
heads in a certain pattern.
For irrigation contractors, water conservation starts with? ✅✅correct answ-A great design
Three methods to evaluate application rate ✅✅correct answ-Densogram, Precipitation rate
formulas, Water audit
,The proper watering time is early morning because? ✅✅correct answ-Sprinkler patterns are
generally less distorted from the wind
arc ✅✅correct answ-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 answ-Landscape Irrigation
Pressure compensating devices help save water because they? ✅✅correct answ-Help eliminate
misting or fogging at the sprinkler heads
Landscape Irrigation ✅✅correct answ-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 answ-(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 answ-Devices which eliminate misting or fogging at the
sprinkler heads, thus achieving better uniformity and saving water
Atmospheric Vacuum Breaker (AVB) ✅✅correct answ-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 ✅✅correct answ-An electrical or hydraulic remote control valve in a
sprinkler system which is activated by an automatic controller
Backflow ✅✅correct answ-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 ✅✅correct answ-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 ✅✅correct answ-A form of backflow due to negative or sub-atmospheric pressure
within water system.
Backflow prevention methods ✅✅correct answ-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 ✅✅correct answ-Air Gap
Atmospheric Vacuum Breaker (AVB)
Pressure Vacuum Breaker (PVB)
Double Check Valve Assembly (DCA)
Reduced Pressure Prevention Device (RP)
Ball Driven Heads ✅✅correct answ-Rotary sprinkler in which roatation is achieved by a steel ball
which is set into a circular motion by water passing through the head
Bubblers ✅✅correct answ-Similar to drip emitters except that they have a much higher flow rate
Flood a small area and the water continues to infiltrate into the soil after the bubbler has been
shutoff.
Applicable in areas where small basins can be constructed to contain the water and where the soil is
surface is level.
Bushing ✅✅correct answ-The pipe fitting used to change an irrigation component to a larger or
smaller size
C-factor ✅✅correct answ-Rating the smoothness inside of the pipe - higher the factor translates
to more smoothness
Check Valve ✅✅correct answ-A valve that allows flow in one direction only
Class Pipe ✅✅correct answ-Four classes used for piping and fittings receiving used water from
buildings. (Class 125-160-200-315)
Class 200 being the most common
