Texas Landscape Irrigation questions and answers

Texas La ndscape Irrigation 4 types of irriga iton sensors - ✔✔Freeze Rain Wind Soil moisture A cross connection is any actual or potential connection between a potable water supply and...? - ✔✔Any source that has the possibility to introduce polluted or contaminated water back into the potable water that is supplying it A device used in electrical troubleshooting is called..? - ✔✔A digital multi meter A device used to turn a quick coupler valve on and off is? - ✔✔Quick coupler key A drawing of an installed irrigation system showing major component s is? - ✔✔Called a record drawing A graphic representation of precipitation is called...? - ✔✔A desogram A measuring device that has measurements as a given number of feet per inch is? - ✔✔Engineer scale A method of maintaining a constant discharge pressure regardless of inlet pressure is called? - ✔✔Pressure compensating A motorized device which creates, or boosts pressure is? - ✔✔A pump A swing joint is used to? - ✔✔To prevent damage to the head A tim ing device which signals the automatic valves to open or close is called a...? - ✔✔Controller, clock, timer A valve that allows water to travel in only one direction is called? - ✔✔Check valve Absorption Rate - ✔✔The speed at which water can penetrate or infiltrate the soil Absorption rate is defined as? - ✔✔Rate at which soil will accept water Actual Head Pressure - ✔✔The operating pressure measured at the base of a sprinkler head. Actual head pressure formula - ✔✔(Static pressure) - (Total pressure l ost) = Actual head pressure air gap - ✔✔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" An AVB has to be installed...? - ✔✔6" higher than the highest head Will stop backsiphonage An electrical valve is also called? - ✔✔Automatic contr ol valve Application Rate (Precipitation rate) - ✔✔Rate at which water is applied by sprinkler heads in a certain pattern. arc - ✔✔Degrees of coverage of a sprinkler from one side of a pattern to the other Atmospheric Vacuum Breaker (AVB) - ✔✔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 windo w. 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 - ✔✔An electrical or hydraulic remote control valve in a sprinkler system which is activated by an automatic controller Backflow - ✔✔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. Backflow prevent ion devices - ✔✔Air Gap Atmospheric Vacuum Breaker (AVB) Pressure Vacuum Breaker (PVB) Double Check Valve Assembly (DCA) Reduced Pressure Prevention Device (RP) Backflow prevention methods - ✔✔Any approved device which prevents an undesirable reversal of flow of water by the introduction of air, check valves, or a combination of both. Backpressure - ✔✔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. Backsiphon age - ✔✔A form of backflow due to negative or sub -atmospheric pressure within water system. Backsiphonage is a form of backflow that could be induced by? - ✔✔A break in the city main Backsiphonage is caused by? - ✔✔Negative or sub -atmospheric pressure