Texas Landscape Irrigation Exam 100%
Correct!!
Pressure compensating devices help save water because they? - ANSWERHelp eliminate misting or
fogging at the sprinkler heads
Landscape Irrigation - ANSWERThe art and management of applying water to landscape in a manner
to encourage growth of plant material and support water conservation
Irrigation sensors - ANSWER(Measure rain, wind, soil moisture, and freeze) that save water and
eliminate liability issues concerning ice related accidents during freeing weather
Pressure Regulation Device - ANSWERDevices which eliminate misting or fogging at the sprinkler
heads, thus achieving better uniformity and saving water
Hydrozoning - ANSWERThe 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 - ANSWERResponsibility 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 - ANSWERThe speed at which water can penetrate or infiltrate the soil
Actual Head Pressure - ANSWERThe operating pressure measured at the base of a sprinkler head.
Actual head pressure formula - ANSWER(Static pressure) - (Total pressure lost) = Actual head
pressure
air gap - ANSWERan 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? - ANSWERKitchen sink
Application Rate (Precipitation rate) - ANSWERRate at which water is applied by sprinkler heads in a
certain pattern.
For irrigation contractors, water conservation starts with? - ANSWERA great design
Three methods to evaluate application rate - ANSWERDensogram, Precipitation rate formulas, Water
audit
The proper watering time is early morning because? - ANSWERSprinkler patterns are generally less
distorted from the wind
arc - ANSWERDegrees 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? - ANSWERLandscape Irrigation
Atmospheric Vacuum Breaker (AVB) - ANSWERBackflow 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 - ANSWERAn electrical or hydraulic remote control valve in a sprinkler
system which is activated by an automatic controller
Backflow - ANSWERAn 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 - ANSWERAny 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 - ANSWERA form of backflow due to negative or sub-atmospheric pressure within
water system.
Backflow prevention methods - ANSWERAny 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 - ANSWERAir Gap
Atmospheric Vacuum Breaker (AVB)
Pressure Vacuum Breaker (PVB)
Double Check Valve Assembly (DCA)
Reduced Pressure Prevention Device (RP)
Ball Driven Heads - ANSWERRotary sprinkler in which roatation is achieved by a steel ball which is set
into a circular motion by water passing through the head
Bubblers - ANSWERSimilar 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 - ANSWERThe pipe fitting used to change an irrigation component to a larger or smaller size
C-factor - ANSWERRating the smoothness inside of the pipe - higher the factor translates to more
smoothness
Check Valve - ANSWERA valve that allows flow in one direction only
Class Pipe - ANSWERFour classes used for piping and fittings receiving used water from buildings.
(Class 125-160-200-315)
Correct!!
Pressure compensating devices help save water because they? - ANSWERHelp eliminate misting or
fogging at the sprinkler heads
Landscape Irrigation - ANSWERThe art and management of applying water to landscape in a manner
to encourage growth of plant material and support water conservation
Irrigation sensors - ANSWER(Measure rain, wind, soil moisture, and freeze) that save water and
eliminate liability issues concerning ice related accidents during freeing weather
Pressure Regulation Device - ANSWERDevices which eliminate misting or fogging at the sprinkler
heads, thus achieving better uniformity and saving water
Hydrozoning - ANSWERThe 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 - ANSWERResponsibility 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 - ANSWERThe speed at which water can penetrate or infiltrate the soil
Actual Head Pressure - ANSWERThe operating pressure measured at the base of a sprinkler head.
Actual head pressure formula - ANSWER(Static pressure) - (Total pressure lost) = Actual head
pressure
air gap - ANSWERan 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? - ANSWERKitchen sink
Application Rate (Precipitation rate) - ANSWERRate at which water is applied by sprinkler heads in a
certain pattern.
For irrigation contractors, water conservation starts with? - ANSWERA great design
Three methods to evaluate application rate - ANSWERDensogram, Precipitation rate formulas, Water
audit
The proper watering time is early morning because? - ANSWERSprinkler patterns are generally less
distorted from the wind
arc - ANSWERDegrees 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? - ANSWERLandscape Irrigation
Atmospheric Vacuum Breaker (AVB) - ANSWERBackflow 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 - ANSWERAn electrical or hydraulic remote control valve in a sprinkler
system which is activated by an automatic controller
Backflow - ANSWERAn 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 - ANSWERAny 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 - ANSWERA form of backflow due to negative or sub-atmospheric pressure within
water system.
Backflow prevention methods - ANSWERAny 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 - ANSWERAir Gap
Atmospheric Vacuum Breaker (AVB)
Pressure Vacuum Breaker (PVB)
Double Check Valve Assembly (DCA)
Reduced Pressure Prevention Device (RP)
Ball Driven Heads - ANSWERRotary sprinkler in which roatation is achieved by a steel ball which is set
into a circular motion by water passing through the head
Bubblers - ANSWERSimilar 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 - ANSWERThe pipe fitting used to change an irrigation component to a larger or smaller size
C-factor - ANSWERRating the smoothness inside of the pipe - higher the factor translates to more
smoothness
Check Valve - ANSWERA valve that allows flow in one direction only
Class Pipe - ANSWERFour classes used for piping and fittings receiving used water from buildings.
(Class 125-160-200-315)
