Martinndungu1986

A device used to turn a quick coupler valve on and off is : - A quick coupler key A drain valve will help protect the irrigation system from : Wasting - Pipe freezing and breaking A drawing of an installed irrigation system showing major components is : - Called an as - built plan A filter , flush valve , and pressure regulator would typically be used with : - Drip irrigation A licensed Irrigator can : - Sell , design , consult regarding installs , maintenance , alterations , repairs servic...

A license is required under four conditions. - 1. Sells, designs, installs, maintains, alters, repairs, or services an irrigation system. 2. Provides consulting services relating to an irrigation systems. 3. Connects an irrigation system to a private or public, raw or potable water supply. 4. Inspects an irrigation systems for a municipality or water district. Four governing standards by TCEQ - 1. Connection of irrigation systems to any water supply 2. Design, installation, and operation o...

4 types of irrigaiton 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 syst...

Double Check Valve Assembly (DCVA) - Backflow device that uses 2 shut-off valves and 2 check valves to prevent backflow. Air Gap - Gap through air between lowest point of water supply & flood level rim. i.e. Sink water level & faucet Anti-Siphon Device - Any device that introduces air into the system to prevent back siphonage. AVB (Atmospheric Vacuum Breaker) or PVB (Pressure-type Vacuum Breaker) Atmospheric Vacuum Breaker (AVB) - Blackflow device that allows air with use of a float. Shap...

A control valve downstream a back flow device may result in : - Constant pressure A dual check valve is approved to protect against.? - none of them A gate valve will have________. - Lees pressure loss than a globe valve of equal size. A pressure vacuum breaker may be installed with a : - Control valve immediately downstream A reduced pressure principle device must be installed _____? - 12 inches above grade A safe critical velocity for the water in PVC pipe is: - 5 ft /s A valve permittin...

Backflow & Siphonage (290.44.h) - All water connections from public drinking water must be protected from contamination where potential hazard exists. Install at the meter through air gap or back flow preventation device. Commision Powers & Duties (SubCh B) - Enforce: 1. Connection of irrigation systems to any water supply 2. Design, install and operation of systems. 3. Water conservation. 4. Duties & responsibilites of licensed irrigators. Cross Connection Control Program (290.44.i) -...

1 column foot of water - .443 psi (pretty close to 5 ft. 1 psi - requires a column of water 2.31 feet tall (or 3 ft.) (or 27.75 in.) A backflow device - Any approved device that prevents an undesireable reversal of flow of water A.W.W.A. - American Water Works Association Absorption Rate - How fast a rate at which the soil will accept water Actual Head Pressure - The operating pressure measured at the base of a sprinkler head air gap - A complete physical separation between the free flowin...

A cross connection is any actual or potential connection between a potable water supply and: a). A well b). Any source that has the possibility to introduce polluted or contaminated water back into the potable water that is supplying it. c). A drinking fountain d). A pump station - b). Any source that has the possibility to introduce polluted or contaminated water back into the potable water that is supplying it. An Atmospheric Vacuum Breaker: a). Will stop backpressure b). Has to be in...

C-Factor - Rating of the smoothness of the inside of the pipe. Higher C-factor = smoother PVC is 150. Copper is 140. Generally decreases over time meaning the pipe gets rougher and more friction loss. Densogram - Graphic view of precipitation to check uniformity. Higher rates are darker. Distribution Uniformity (DU) - Uniformity of distribution of water over a given area as a %. Found by doing a catch can test. Closer to 100% is better with 75%-80% excellent, 65%-75% good and <65% poo...

BPA requirements for fertilizer injection system - Reduced Pressure Principle Assembly (RPPA) (RPZ) is required when fertilizer injection are being used. Causes backsiphonage? - Caused by a negative or Sub-atmospheric pressure. Example-City departments are using fire hydrant or there's a city main line break, or someone sucking liquid from a glass using a straw. Causes of leaking check valve - Debris-can enter the valve. (Can use Y strainer to provide a solution.) characteristics of flow ...