TEXAS LANDSCAPE IRRIGATION EXAM
QUESTIONS AND ANSWERS 100%
CORRECT!
,Pressure compensating devices help save water because they? - ANSWER Help
eliminate misting or fogging at the sprinkler heads
Landscape Irrigation - ANSWER The 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 - ANSWER Devices which eliminate misting or fogging at
the sprinkler heads, thus achieving better uniformity and saving water
Hydrozoning - ANSWER 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 - ANSWER 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 - ANSWER The speed at which water can penetrate or infiltrate the soil
Actual Head Pressure - ANSWER The 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 - ANSWER 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? - ANSWER Kitchen sink
Application Rate (Precipitation rate) - ANSWER Rate at which water is applied by
sprinkler heads in a certain pattern.
, For irrigation contractors, water conservation starts with? - ANSWER A great design
Three methods to evaluate application rate - ANSWER Densogram, Precipitation rate
formulas, Water audit
Automatic control valve - ANSWER An electrical or hydraulic remote control valve in a
sprinkler system which is activated by an automatic controller
Backflow - ANSWER 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 - ANSWER 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 - ANSWER A form of backflow due to negative or sub-atmospheric
pressure within water system.
Backflow prevention methods - ANSWER 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 - ANSWER Air Gap
Atmospheric Vacuum Breaker (AVB)
Pressure Vacuum Breaker (PVB)
Double Check Valve Assembly (DCA)
Reduced Pressure Prevention Device (RP)
Ball Driven Heads - ANSWER 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 - ANSWER 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 - ANSWER The pipe fitting used to change an irrigation component to a larger
or smaller size
QUESTIONS AND ANSWERS 100%
CORRECT!
,Pressure compensating devices help save water because they? - ANSWER Help
eliminate misting or fogging at the sprinkler heads
Landscape Irrigation - ANSWER The 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 - ANSWER Devices which eliminate misting or fogging at
the sprinkler heads, thus achieving better uniformity and saving water
Hydrozoning - ANSWER 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 - ANSWER 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 - ANSWER The speed at which water can penetrate or infiltrate the soil
Actual Head Pressure - ANSWER The 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 - ANSWER 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? - ANSWER Kitchen sink
Application Rate (Precipitation rate) - ANSWER Rate at which water is applied by
sprinkler heads in a certain pattern.
, For irrigation contractors, water conservation starts with? - ANSWER A great design
Three methods to evaluate application rate - ANSWER Densogram, Precipitation rate
formulas, Water audit
Automatic control valve - ANSWER An electrical or hydraulic remote control valve in a
sprinkler system which is activated by an automatic controller
Backflow - ANSWER 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 - ANSWER 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 - ANSWER A form of backflow due to negative or sub-atmospheric
pressure within water system.
Backflow prevention methods - ANSWER 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 - ANSWER Air Gap
Atmospheric Vacuum Breaker (AVB)
Pressure Vacuum Breaker (PVB)
Double Check Valve Assembly (DCA)
Reduced Pressure Prevention Device (RP)
Ball Driven Heads - ANSWER 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 - ANSWER 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 - ANSWER The pipe fitting used to change an irrigation component to a larger
or smaller size
