Texas Landscape Irrigation Exam Questions and Answers, Exams of Geography

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Questions And Answers

Pressure compensating devices help save water because they? - correct answer ✅Help eliminate misting or fogging at the sprinkler heads Landscape Irrigation - correct 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 - correct 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 - correct answer ✅Devices which eliminate misting or fogging at the sprinkler heads, thus achieving better uniformity and saving water Hydrozoning - correct 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

Questions And Answers

Licensed landscape irrigators - correct 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 - correct answer ✅The speed at which water can penetrate or infiltrate the soil Actual Head Pressure - correct answer ✅The operating pressure measured at the base of a sprinkler head. Actual head pressure formula - correct answer ✅(Static pressure) - (Total pressure lost) = Actual head pressure air gap - correct 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"

Questions And Answers

Most common air gap? - correct answer ✅Kitchen sink Application Rate (Precipitation rate) - correct answer ✅Rate at which water is applied by sprinkler heads in a certain pattern. For irrigation contractors, water conservation starts with? - correct answer ✅A great design Three methods to evaluate application rate - correct answer ✅Densogram, Precipitation rate formulas, Water audit The proper watering time is early morning because? - correct answer ✅Sprinkler patterns are generally less distorted from the wind arc - correct answer ✅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

Questions And Answers

is? - correct answer ✅Landscape Irrigation Atmospheric Vacuum Breaker (AVB) - correct answer ✅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 answer ✅An electrical or hydraulic remote control valve in a sprinkler system which is activated by an automatic controller Backflow - correct 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 - correct answer ✅Any condition that could create pressure in the

Questions And Answers

discharge side of the piping system that is greater than that of the supply side of the system. Backsiphonage - correct answer ✅A form of backflow due to negative or sub-atmospheric pressure within water system. Backflow prevention methods - correct 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 - correct answer ✅Air Gap Atmospheric Vacuum Breaker (AVB) Pressure Vacuum Breaker (PVB) Double Check Valve Assembly (DCA) Reduced Pressure Prevention Device (RP) Ball Driven Heads - correct 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

Questions And Answers

Bubblers - correct 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 - correct answer ✅The pipe fitting used to change an irrigation component to a larger or smaller size C-factor - correct answer ✅Rating the smoothness inside of the pipe - higher the factor translates to more smoothness Check Valve - correct answer ✅A valve that allows flow in one direction only Class Pipe - correct answer ✅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

Control Wires - correct answer ✅The wire that transmits the signals from automatic controller to automatic electric valves to open and close the valves. cross-connection - correct answer ✅Any actual or potential connection between a potable water supply and any source of contamination or pollution Design Pressure - correct answer ✅Sum total of the desired head pressure added to the total of all pressure losses. Design Pressure=Minimum head pressure + Total of all pressure losses Desired Head Pressure - correct answer ✅The manufactures minimum recommended operating pressure for a specific head. Densogram - correct answer ✅Graphic representation of precipitation ID/OD - correct answer ✅Inside diameter/Outside diameter

Questions And Answers

Direct burial wire - correct answer ✅Any wire approved for direct underground burial without conduit. Distribution Uniformity - correct answer ✅measure the uniformity of irrigation water over an area (Generally rotary heads have better uniformity than spray heads) Double Check Valve Assembly - correct answer ✅Backflow prevention assembly, using two shut off valves and two check valves assembled and pre-tested at the factory, designed to physically block or prevent the backflow of water drip irrigation - correct answer ✅a method of supplying irrigation water through tubes that literally drip water onto the soil at the base of each plant. 48" or less Dry Line Shock (Dry Pipe Shock) - correct answer ✅Travel of unrestricted water flow in empty piping Dynamic pressure - correct answer ✅The force exerted by a fluid in motion

Questions And Answers

Dynamic water - correct answer ✅Water that is in motion through a system Elevation gain - correct answer ✅Pressure gained as water is used downhill from its source Elevation lost - correct answer ✅Pressure lost as water is used uphill from its source Emitters - correct answer ✅Small mechanical device used in drip irrigation to limit water flow to a drip or slow trickle Evaporation - correct answer ✅The change of a substance from a liquid to a gas Evapotranspiration (ET) - correct answer ✅loss of water by evaporation from the soil surface and transpiration by plants FIP - correct answer ✅Female Iron Pipe

Questions And Answers

Flow-Control Valve - correct answer ✅A device that controls the rate of flow of a fluid. Foot of head - correct answer ✅A measure of pressure equivalent to .433 pounds per square inch and equal to the weight of one vertical foot of water on a one-square inch surface. FPS - correct answer ✅Feet per second Friction loss - correct answer ✅The reduction in pressure resulting from the water being in contact with the side of the hose. This contact requires force to overcome the drag that the wall of the hose creates. Gate Valve - correct answer ✅Control valve with a solid plate operated by a handle and screw mechanism. Rotating the handle moves the plate into or out of the waterway. Gauge (wire) - correct answer ✅Standards used for wire sizing. the larger the gauge number, the smaller the wire.

Questions And Answers

Gear Driven Heads - correct answer ✅Type of rotary sprinkler head that has a slower, constant rotation that is achieved by water passing through a series of gears within a head. Globe Valve - correct answer ✅A valve which uses a rubber or composition plug against the valve body seat to restrict or stop the flow of water. GPH - correct answer ✅Gallons per hour GPM - correct answer ✅Gallons per minute Gray water - correct answer ✅Domestic wastewater composed of wash water from household sinks, tubs, and washers. Head to Head Spacing - correct answer ✅Spacing of heads that is equal to the published radius. Hydraulics - correct answer ✅The study of fluid while in motion or at rest

Questions And Answers

Hydrozone - correct answer ✅A portion of the landscaped area having plants with similar water needs that are served by a valve or set of valves with the same schedule Example: Naturalized area planted with native vegetation that will not need supplemental irrigation once established is a non-irrigated hydrozone. Impact Head - correct answer ✅Type of rotary sprinkler head that utilizes a driver arm to create rotation. Infiltration rate - correct answer ✅The quantity of water that enters the soil surface in a specified time interval. Often expressed in volume of water per unit of soil surface area per unit of time. Insert Fitting - correct answer ✅A fitting which fits inside the pipe or tubing. Usually used on polyethylene pipe and tubing. IPS - correct answer ✅Iron pipe size

Questions And Answers

Irrigation Design - correct answer ✅A plan showing graphic or dimensional location of the components of an irrigation system Isolation valve - correct answer ✅A gate or ball valve, serves as a main shut-off device for the complete irrigation system as needed for servicing or repair. Must be located between the meter and the backflow devices. landscape irrigation - correct answer ✅Art and management of applying water to the landscape in a manner to encourage the growth of plant material and support water conservation. Lateral Piping - correct answer ✅Piping between the remote control valve, not subject to constant main line pressure, and the sprinkler head. Loop Main Line - correct answer ✅A main line designed to provide water to any valve from two or more directions. Generally improves hydraulics in larger landscapes.

Questions And Answers

Manifold - correct answer ✅A group of two or more control valves together in one location and/or valve box. Master valve - correct answer ✅Automatic or manual valve installed at the supply point which controls water flow into the system main line piping. Matched precipitation (MPR) - correct answer ✅All sprinkler heads within a watering zone will produce similar precipitation rates, regardless of the pattern they cover. MIP - correct answer ✅Male iron pipe MIPT - correct answer ✅Male iron pipe thread Non-potable water - correct answer ✅Water not safe for drinking, personal, or culinary utilization.

Questions And Answers

Nozzle Tree - correct answer ✅Interchangeable nozzle assortment, with different GPM and radii, provided with many rotary heads POC - correct answer ✅Point of connection Polyethylene Pipe (PE) - correct answer ✅Flexible plastic pipe which uses insert fittings. Potable water - correct answer ✅water that is safe to drink Precipitation rate - correct answer ✅Precipitation rate (PR) is a calculation of the flow rate (application rate) over the square footage of the zone. 96.25 = constant that converts gallons per minute (GPM) to inches per hour. Pressure compensating - correct answer ✅A method of maintaining a constant discharge pressure regardless of inlet pressure.

Questions And Answers

Pressure Regulator - correct answer ✅Mechanical device that lowers water pressure on the downstream side of the unit. Pressure Vacuum Breaker - correct answer ✅A backflow prevention assembly that incorporates a spring-loaded check valve and introduces air into the system to prevent "back siphonage" P.S.I. - correct answer ✅Pounds per square inch PVC pipe - correct answer ✅Poly vinyl chloride pipe. Quick Coupler Valve - correct answer ✅A constantly pressurized valve set vertically in the ground to provide supplemental water when a coupler key is inserted. Radius - correct answer ✅The distance from the center of a circle to any point on the circle

Questions And Answers

Reduced pressure principle device (RP,RPZ, or RPP) - correct answer ✅Backflow prevention device that consist of two independently acting check valves, together with an automatic operating pressure differential relief valve located between the two check valves. Rotary heads - correct answer ✅Sprinkler heads that use the energy of the water to rotate the sprinkler. Most common heads are impact, gear and ball driven heads. Run-off - correct answer ✅water that is not absorbed into the ground, instead flows into streams or other collection areas Saddle - correct answer ✅A type of fitting which attaches around the pipe Scheduling - correct answer ✅The process of calculating and managing the time and amount of water to apply to a landscape Schedule Pipe - correct answer ✅A classification system for pipe designating standard wall thickness for all sizes in which the pipe is made.

Questions And Answers

S.D.R. -

correct answer ✅Standard dimension ratio Sensors - correct answer ✅Refers to four types of irrigation sensor units that assist in water conservation 4 types of irrigaiton sensors - correct answer ✅Freeze Rain Wind Soil moisture Service line - correct answer ✅Piping from the city main to the water meter. Sleeves - correct answer ✅Piping conduit under hardscapes for the purpose of piping or wiring. soil types - correct answer ✅sand, silt, clay

Questions And Answers

Solenoid - correct answer ✅An electromagnetic coil used to control a mechanical device such as a valve. Solvent - correct answer ✅A liquid substance capable of dissolving other substances Solvent welding - correct answer ✅a solvent is applied to both surfaces to temporarily dissolve the polymer at room temperature Spray heads - correct answer ✅Sprinkler heads that throw a uniform sheet of water in a fixed or adjustable pattern. Static Pressure - correct answer ✅The force exerted by an enclosed, non-moving fluid when pressure is applied to the fluid Static water - correct answer ✅Water that is not moving

Questions And Answers

Swing Joint - correct answer ✅Flexible joint or pipe connecting a sprinkler head to a pipe. Thrust block - correct answer ✅A mass of concrete or similar material appropriately placed around a pipe to prevent movement when the pipe is carrying water. Usually placed at bends and valve structures. Transpiration - correct answer ✅Evaporation of water from the leaves of a plant Valve-in-head - correct answer ✅indicates that the automatic control valve is part of the sprinkler Velocity of water - correct answer ✅Speed at which water travels through the piping systems. Measured in FPS. PVC= 5FPS Copper= 9FPS

Questions And Answers

Water Hammer - correct answer ✅The concussion and banging noise that results when a volume of water moving in a pipe suddenly stops or loses momentum. Water Window - correct answer ✅Allotted time available for watering through an irrigation system, usually within a 24 hour period. Zone - correct answer ✅Group of sprinklers that are controlled by the same valve. Properly designed irrigation system can? - correct answer ✅Save water, time, and money Basic irrigation dates back? - correct answer ✅Thousands of years The impact sprinkler head was introduced by Rain Bird in? - correct answer ✅ 1933 Landscape irrigation, as we know it, has been around since? - correct answer ✅Turn of the 20th century

Questions And Answers

The issue of top priority in irrigation today is? - correct answer ✅Water conservation The shortage of water is a result of? - correct answer ✅Water being a fixed resource Every irrigation plan needs? - correct answer ✅North arrow, legend, stamp/seal Possible solutions to the scarcity of water include? - correct answer ✅Building desalination plants Which is not a possible solution for the scarcity of water? - correct answer ✅Constructing dams One of the seven basic landscaping principles of Xericscaping is? - correct answer ✅Mulching Efficient irrigation is geared more directly toward? - correct answer ✅Manufacturers, irrigation contractors, homeowners, and proper education

Questions And Answers

Manufactures can impact water conservation by producing? - correct answer ✅Better low volume irrigation products Which of the following is not a basic principle of Xericscaping? - correct answer ✅Sizing components Which of the following describes the rate at which water is applied by sprinkler heads in a certain pattern? -Precipitation rate -Infiltration rate -Application rate -Absorption rate -Precipitation and Application rate - correct answer ✅Precipitation and application rate Absorption rate is defined as? - correct answer ✅Rate at which soil will accept water Static pressure minus all pressure losses will give you? - correct answer ✅Actual head pressure

Questions And Answers

The degrees of coverage of a sprinkler from one side of a pattern to the other is? - correct answer ✅The arc A timing device which signals the automatic valves to open or close is called a...? - correct answer ✅Controller, clock, timer A device used to turn a quick coupler valve on and off is? - correct answer ✅Quick coupler key Minimum head pressure plus the total of all pressure losses equals...? - correct answer ✅Design pressure A graphic representation of precipitation is called...? - correct answer ✅A desogram The flexible portion of the remote control valve which regulates the passage of water through the valve is called? - correct answer ✅A diaphragm A device used in electrical troubleshooting is called..? - correct answer ✅A digital multi meter

Questions And Answers

Which device can be used to help prevent freezing of water in the piping? - correct answer ✅Drain valve Slow application rates expressed in GPH are usually referring to what type of irrigation? - correct answer ✅Drip irrigation What small mechanical device is used to limit water flow to a very low drip or trickle? - correct answer ✅An emitter A measuring device that has measurements as a given number of feet per inch is? - correct answer ✅Engineer scale Wastewater, such as from your bath, sink, or washing machines, is called? - correct answer ✅Greywater In order to run multiple sprinkler heads, with varying arcs, on the same zone, the sprinkler heads must have? - correct answer ✅Matched precipitation rates