Texas Irrigation Technician Exam Study Guide - Practice-Ready Answer Guide

Texas Irrigation Technician Exam Study Guide - Practice-Ready Answer Guide Who composes the Irrigator Council? - answer - 6 Irrigators, 3 Public members, all from the same state What is the purpose of the Irrigator Council? - answer - Provide advice on matters concerning irrigation Possible consequence of installing a system w/o a license? - answer - Being charged with a Class C misdemeanor Absorption Rate - answer - How fast a rate at which the soil will accept water Actual Head Pressure - answer - The operating pressure measured at the base of a sprinkler head How to CALCULATE Actual head pressure? - answer - subtract all pressure losses from static pressure air gap - answer - A complete physical separation between the free flowing discharge end of a potable water supply pipeline and an open or non-pressure recieveing vessel Application Rate - answer - Rate that a head applies water to the area it's spraying What term is Application rate synonymous with? - answer - Precipitation Rate Arc - answer - The surface area of the landscape that the head will provide water (half, full, 90, 25) as-built plans - answer - A corrected or redrawn plan, showing location of all major components of a system A.W.W.A. - answer - American Water Works Association Backflow - answer - The UNDESIREABLE reverse flow of water in a piping system Back pressure - answer - Condition that can happen due to elevation pumps, pressure Back siphonage - answer - backflow due to a sub atomic pressure (break in city main, fire hydrant being used Backflow prevention - answer - A mechanical means to prevent a backflow A backflow device - answer - Any approved device that prevents an undesireable reversal of flow of water 1 column foot of water - answer - .443 psi (pretty close to 5 ft. 1 psi - answer - requires a column of water 2.31 feet tall (or 3 ft.) (or 27.75 in.) max flowrate for 1/2 in pipe (to stay below 5 fps) - answer - 5 gpm max flowrate for 3/4 in pipe (to stay below 5 fps) - answer - 10 gpm max flowrate for 1 in pipe (to stay below 5 fps) - answer - 15 gpm max flowrate 1 1/4 in. pipe (to stay below 5 fps) - answer - 25 gpm max flowrate for 1 1/2 in pipe (to stay below 5 fps) - answer - 35 gpm Key requirement for RPZ backflow - answer - minimum of 12" above grade Key requirement for Double Check backflow (DCVA) - answer - Test cocks must be plugged with non-ferrous (non-magnetic) material Key requirements for PVB and SVB - answer - Must be 12" above highest head, valve, pipe, fitting, or fixture Key requirements for Air Gap - answer - The recieving pipe must be 1" wider or 2 times bigger than the discharge pipe zone flow - answer - how many gallons go through a zone Backflow Prevention Assembly - answer - Any assembly used to prevent backflow into a potable water system. The type of assembly used is based on the existing or potential degree of health hazard and backflow condition. booster pump - answer - increases operating pressure Bushing - answer - The method of adapting a fitting to either a larger or smaller size. Check Valve - answer - A valve that allows flow in one direction but prevents flow in the opposite direction. Completion of irrigation system - answer - All standards are met and the irrigator is satisfied Class Pipe - answer - Class = How many pounds of pressure it can withstand before the pipe bursts Consulting - answer - Can't do it ass a tech Control Wires - answer - The wires that transmit the signals to open and close from the automatic controller to the automatic electric valves. cross-connection - answer - Physical link between safe water and dirty water cycle - answer - Best way to irrigate = cycle and soak Design Pressure - answer - Pressure required for an emission device to work properly Direct Burial Wire - answer - (listed UL UF) Any wire approved for direct underground burial without conduit. Distribution Uniformity - answer - How a system uniformly applies water to a zone Drain Va