TEXAS IRRIGATION LICENSE EXAM 2024 ACTUAL EXAM, Exams of European Computer Driving Licence (ECDL)

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P a g e | 1 TEXAS IRRIGATION LICENSE EXAM 2024 ACTUAL EXAM COMPLETE 150 QUESTIONS WITH DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) ALREADY GRADED A+ A licensed irrigator must renew his/her every ______ years. - CORRECT ANSWER >>>>three ________, _________, and _________ are the goals of the TCEQ. - CORRECT ANSWER >>>>Enforcement, Water Quality, Waste management Licensed ______ are responsible for obtaining permits and inspections. - CORRECT ANSWER >>>>irrigators P a g e | 2 _______________ can install an irrigation system - CORRECT ANSWER >>>>Both ( Licensed Irrigator and Technician ) A TECHNICIAN can alter the irrigation design only when he/she ___________. - CORRECT ANSWER >>>>receives approval from the licensed irrigator The "Commission" refers to _______ - CORRECT ANSWER >>>>Texas Commission on Environmental Quality (TCEQ) The Texas Irrigator's Advisory Council is made up of __ members - CORRECT ANSWER >>>>nine The members of the Texas Irrigator's Advisory Council are appointed by _________. - CORRECT ANSWER >>>>the Texas Commission on Environmental Quality (TCEQ) The Texas Irrigator's Advisory Council must have ___ representatives of the public - CORRECT ANSWER >>>>THREE P a g e | 5 According to the "Rules and Regulations for Licensed Irrigators" an irrigation system MUST be designed and installed in a manner that promotes water conservation. - CORRECT ANSWER >>>>TRUE Absorption Rate is also known as ______. - CORRECT ANSWER >>>>infiltration rate An atmospheric Vacuum breaker id commonly referred as an ______ - CORRECT ANSWER >>>>anti-siphon The larger the gauge number, - CORRECT ANSWER >>>>Smaller the diameter of the wire __________ ___________ is when all the heads discharge varying amounts of water, combining to produce uniform coverage - CORRECT ANSWER >>>>Matched Precipitation Static Pressure - All pressure losses = - CORRECT ANSWER >>>>Dynamic Head Pressure P a g e | 6 AWWA - CORRECT ANSWER >>>>American Water Works Association A _______ is valve that permits water to flow in one direction only - CORRECT ANSWER >>>>CHECK valve A ______ is one complete operation of a controller through all programed stations - CORRECT ANSWER >>>>CIRCUIT ______ pressure is the minimus pressure required for a system to operate properly - CORRECT ANSWER >>>>DESIGN __________ is a type of damage occurring when water travels unrestricted through empty lateral lines - CORRECT ANSWER >>>>DRY LINE SHOCKED AND APPALLED An ________ is a device which allows water to flow out slowly in a drip irrigation system - CORRECT ANSWER >>>>EMITTER P a g e | 7 Emitters use _____ to measure precipitation rate - CORRECT ANSWER >>>>GAL PRE HOUR (GPH) Spray heads use ___ to measure precipitation rate - CORRECT ANSWER >>>>GAL PER MIN (GPM) Pressure is lost as water moves through the piping is a result of _________ - CORRECT ANSWER >>>>FRICTION The design pressure should not exceed ________ of the static pressure - CORRECT ANSWER >>>>90% Sleeves should be at least ______ larger than the irrigation piping required - CORRECT ANSWER >>>>two sizes PVC pipe with the same physical dimensions as iron pipe. - CORRECT ANSWER >>>>SCHEDULE PIPE ________ is the process of plant material giving off water vapor from their leaves - CORRECT ANSWER >>>>TRANSPIRATION P a g e | 10 side of the device is _________ - CORRECT ANSWER >>>>Back Pressure _____________ is most recommended for system with fertilizer injectors - CORRECT ANSWER >>>>Reduced Pressure Principle For low hazard applications, ________ is recommended - CORRECT ANSWER >>>>ANY BACK FLOW DEVICE The ________________. can be installed below grade ( ground level ) - CORRECT ANSWER >>>>Double Check Valve Assembly _________, ___________, and ___________ can be under constant pressure - CORRECT ANSWER >>>>Pressure Vacuum Breaker, Double Check Valve Assembly, Reduced Pressure Principle ________ and _______ are acceptable back flow devices where there is a possibility of back pressure P a g e | 11 - CORRECT ANSWER >>>>Double Check Valve Assembly, Reduced Pressure Principle __________, __________, and _________ are back flow devices recommended to prevent back siphonage - CORRECT ANSWER >>>>Atmospheric Vacuum Breaker, Pressure Vacuum Breaker, Double Check Valve Assembly An atmospheric vacuum breaker is not suitable for ___________ - CORRECT ANSWER >>>>Back Pressure A pressure vacuum breaker, unlike the atmospheric vacuum breaker,_________ - CORRECT ANSWER >>>>will operate satisfactory under constant pressure Back flow in the water distribution system can be caused by ________ and _________ - CORRECT ANSWER >>>>Back Pressure and Back Siphonage P a g e | 12 A pressure vacuum breaker may be installed with a ___________ - CORRECT ANSWER >>>>control valve immediately downstream Back flow prevention assemblies on high hazard systems should be repaired ____________ - CORRECT ANSWER >>>>when field test results show failure A control valve downstream a back flow device may result in ________ - CORRECT ANSWER >>>>Constant Pressure Where are shut off valves located on an AVB? - CORRECT ANSWER >>>>There are no shut-off valves A D.C.A. has ___ test cocks - CORRECT ANSWER >>>>FOUR If the AVB is installed in the wrong direction, ____________ - CORRECT ANSWER >>>>water will escape through the top portion of the device P a g e | 15 With most rotary heads, if you adjust the arc down, the discharge rate ___________ - CORRECT ANSWER >>>>remains the same Rotary heads precipitate water more rapidly than other types of heads - CORRECT ANSWER >>>>FALSE Irrigation heads should be selected ________ - CORRECT ANSWER >>>>To apply water equal to or slightly below the infiltration rate of the soil. Frequent watering will result in ______ - CORRECT ANSWER >>>>a shallow root system ______ ________ is not ideal for dissolving surface fertilizer - CORRECT ANSWER >>>>Subsurface Drip ________ are essential to prevent emitters from clogging - CORRECT ANSWER >>>>FILTERS It is never acceptable to run drip Lins and spray heads on the same valves, - CORRECT ANSWER >>>>because their precipitation rates vary P a g e | 16 The licensed irrigator should base his/her design on __________ - CORRECT ANSWER >>>>average nighttime wind speeds The _____ ____ is the part of a sprinkler system that will be under constant pressure - CORRECT ANSWER >>>>MAIN LINE A gate valve will have _________ - CORRECT ANSWER >>>>Less pressure loss than a globe valve of equal size Schedule 40 fittings can be solvent welded to: - CORRECT ANSWER >>>>Schedule 40 pipe, Class Pipe, schedule 80 pipe, Potable water is _____ - CORRECT ANSWER >>>>water that suitable for human consumption the "C" valve - CORRECT ANSWER >>>>The lower the "C" valve, the greater the friction loss P a g e | 17 The main design factor that affects the effectiveness of a sprinkler system is __________ - CORRECT ANSWER >>>>PRECIPITATION RATE Conventional spray heads discharge a spray pattern that is usually ______ in shape - CORRECT ANSWER >>>>CIRCULAR __________ _________ __________ would be most affected by adverse wind - CORRECT ANSWER >>>>ROTARY TYPE HEADS A well designed rotary system can be just as efficient as a well designed system with spray heads - CORRECT ANSWER >>>>TRUE _________ _________ is resistant to UV light - CORRECT ANSWER >>>>polythylene tubing Electric Valves are classified as - CORRECT ANSWER >>>>NORMALLY CLOSED P a g e | 20 shrub heads on risers __________ - CORRECT ANSWER >>>>can be a hazard and should be placed against a wall or structure Excessive water pressure for a sprinkler system - CORRECT ANSWER >>>>Can shorten the operating life of the heads, uneven distribution of water, major cause for water waste Never place rotary and spray heads on the same circuit because _______ - CORRECT ANSWER >>>>their precipitation rates vary greatly As the wall thickness of a pipe increases the inside diameter - CORRECT ANSWER >>>>decreases As the wall thickness of a pipe increases the outside diameter - CORRECT ANSWER >>>>stays the same In the case of 1" pipe, the 1" is - CORRECT ANSWER >>>>the nominal size P a g e | 21 Corrosion caused when two dissimilar metals come in contact with each other is ________ - CORRECT ANSWER >>>>ELECTROLYSIS Which is not a designated type of copper tubing? M K S L - CORRECT ANSWER >>>>S Which of the following would have the smallest inside diameter? 1" type "K" copper 1" type "M" copper 1" type "L" copper - CORRECT ANSWER >>>>1" type "K" copper If the pipe is 1", then the sleeve should be at least _____ " - CORRECT ANSWER >>>>1 1/2" PVC 2210 has a design burst strength of - CORRECT ANSWER >>>>1000 psi P a g e | 22 Class 315 pipe - CORRECT ANSWER >>>>has a working pressure rating of 315 psi A safe critical velocity for the water in PVC pipe is. - CORRECT ANSWER >>>>5 ft/s Oversizing piping results in _______ - CORRECT ANSWER >>>>More expense Looping a main supply line in sprinkler system can. - CORRECT ANSWER >>>>Lower pressure loss to the circuits and Allow you to use smaller pipe for the main supply line The main factor used to determine how to size down lateral line piping is _________- - CORRECT ANSWER >>>>PRESSURE AND VELOCITY If a system's head spacing is 15', then its row spacing should be _____ for TRIANGULAR spacing - CORRECT ANSWER >>>>13' If a gear driven rotary head is installed at an angle, - CORRECT ANSWER >>>>the spray pattern will be P a g e | 25 Slope Formula - CORRECT ANSWER >>>>rise/run Feet to PSI - CORRECT ANSWER >>>>FT * .433 PSI to FT - CORRECT ANSWER >>>>PSI / .433 Triangular head spacing. - CORRECT ANSWER >>>>Head Spacing * .866 = row spacing Design Pressure - CORRECT ANSWER >>>>Recommended Head Pressure + Total Losses Actual Head Pressure - CORRECT ANSWER >>>>Static Pressure - Total Losses Atmospheric Vacuum Breaker (AVB) - CORRECT ANSWER >>>>Back Siphonage, Low Hazard, High Hazard 6" above highest outlet, Vertical P a g e | 26 Pressure Vacuum Breaker (PVB) - CORRECT ANSWER >>>>Back Siphonage, Constant Pressure, Low Hazard, High Hazard 12" above highest outlet, 2 test cocks, 2 shut-offs Double Check Valve Assembly (DCVA) - CORRECT ANSWER >>>>Back Siphonage, Back Pressure, Constant Pressure, Low Hazard, Below Grade, Vertical/Horizontal, 4 Test Cocks, 2 Shut-offs, Y-Type on inlet side Reduced Pressure Zone Backflow Preventer - CORRECT ANSWER >>>>Back Siphonage, Back Pressure, Constant Pressure, P a g e | 27 Low Hazard, High Hazard, 12" above Grade, Horizontal, 4 Test Cocks, 2 Shut-offs Must be used when chemicals are involved