Texas Landscape Irrigation Questions and Answers
Absorption Rate Correct Ans-The speed at which water can penetrate or infiltrate the soil
Actual Head Pressure Correct Ans-The operating pressure measured at the base of a
sprinkler head.
Actual head pressure formula Correct Ans-(Static pressure) - (Total pressure lost) = Actual
head pressure
air gap Correct Ans-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 Ans-Kitchen sink
Application Rate (Precipitation rate) Correct Ans-Rate at which water is applied by
sprinkler heads in a certain pattern.
For irrigation contractors, water conservation starts with? Correct Ans-A great design
Three methods to evaluate application rate Correct Ans-Densogram, Precipitation rate
formulas, Water audit
The proper watering time is early morning because? Correct Ans-Sprinkler patterns are
generally less distorted from the wind
arc Correct Ans-Degrees of coverage of a sprinkler from one side of a pattern to the other
, Texas Landscape Irrigation Questions and Answers
The art and management of applying water to the landscape to encourage the growth of plant
material and support water conservation is? Correct Ans-Landscape Irrigation
Atmospheric Vacuum Breaker (AVB) Correct Ans-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 Ans-An electrical or hydraulic remote control valve in a
sprinkler system which is activated by an automatic controller
Backflow Correct Ans-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 Ans-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 Ans-A form of backflow due to negative or sub-atmospheric
pressure within water system.
Backflow prevention methods Correct Ans-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 Ans-Air Gap
Atmospheric Vacuum Breaker (AVB)
Pressure Vacuum Breaker (PVB)
, Texas Landscape Irrigation Questions and Answers
Double Check Valve Assembly (DCA)
Reduced Pressure Prevention Device (RP)
Ball Driven Heads Correct Ans-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 Ans-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 Ans-The pipe fitting used to change an irrigation component to a larger or
smaller size
C-factor Correct Ans-Rating the smoothness inside of the pipe - higher the factor translates
to more smoothness
Check Valve Correct Ans-A valve that allows flow in one direction only
Class Pipe Correct Ans-Four classes used for piping and fittings receiving used water from
buildings. (Class 125-160-200-315)
Class 200 being the most common
Control Wires Correct Ans-The wire that transmits the signals from automatic controller to
automatic electric valves to open and close the valves.
cross-connection Correct Ans-Any actual or potential connection between a potable water
supply and any source of contamination or pollution
Absorption Rate Correct Ans-The speed at which water can penetrate or infiltrate the soil
Actual Head Pressure Correct Ans-The operating pressure measured at the base of a
sprinkler head.
Actual head pressure formula Correct Ans-(Static pressure) - (Total pressure lost) = Actual
head pressure
air gap Correct Ans-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 Ans-Kitchen sink
Application Rate (Precipitation rate) Correct Ans-Rate at which water is applied by
sprinkler heads in a certain pattern.
For irrigation contractors, water conservation starts with? Correct Ans-A great design
Three methods to evaluate application rate Correct Ans-Densogram, Precipitation rate
formulas, Water audit
The proper watering time is early morning because? Correct Ans-Sprinkler patterns are
generally less distorted from the wind
arc Correct Ans-Degrees of coverage of a sprinkler from one side of a pattern to the other
, Texas Landscape Irrigation Questions and Answers
The art and management of applying water to the landscape to encourage the growth of plant
material and support water conservation is? Correct Ans-Landscape Irrigation
Atmospheric Vacuum Breaker (AVB) Correct Ans-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 Ans-An electrical or hydraulic remote control valve in a
sprinkler system which is activated by an automatic controller
Backflow Correct Ans-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 Ans-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 Ans-A form of backflow due to negative or sub-atmospheric
pressure within water system.
Backflow prevention methods Correct Ans-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 Ans-Air Gap
Atmospheric Vacuum Breaker (AVB)
Pressure Vacuum Breaker (PVB)
, Texas Landscape Irrigation Questions and Answers
Double Check Valve Assembly (DCA)
Reduced Pressure Prevention Device (RP)
Ball Driven Heads Correct Ans-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 Ans-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 Ans-The pipe fitting used to change an irrigation component to a larger or
smaller size
C-factor Correct Ans-Rating the smoothness inside of the pipe - higher the factor translates
to more smoothness
Check Valve Correct Ans-A valve that allows flow in one direction only
Class Pipe Correct Ans-Four classes used for piping and fittings receiving used water from
buildings. (Class 125-160-200-315)
Class 200 being the most common
Control Wires Correct Ans-The wire that transmits the signals from automatic controller to
automatic electric valves to open and close the valves.
cross-connection Correct Ans-Any actual or potential connection between a potable water
supply and any source of contamination or pollution
