Texas Irrigation Exam Practice Test True/False Q&A 2023

Texas Irrigation Exam Practice Test True/False Q&A 2023 T F Surge irrigation is used along with center pivot swing arms to provide more uniform irrigation? - False T F Worn or cracked gaskets can be replaced to reduce leaks between sections of aluminum sprinkler pipe by the farmer? - True T F Gaskets between 3 inch hand line sprinklers are made of only one material, rubberized leather. - False T F The lateral carries water from the pump to the mainline. - False T F Organic matter percentage and soil texture affect the intake or infiltration rate of water? - True T F Trimming an impeller means to put it into a different volute case? - False T F If water is applied to a soil in excess of the infiltration rate, runoff will occur? - True T F The volute case is a protective covering on a center pivot "big gun?" - False T F Pump panels contain the electrical protection and on/off switch for pump motors? - True T F A displacement pump can have the discharge valve closed most of the way without damaging the pump? - False ________impellers can pass the largest debris but have lower pressure capabilities. - Open _______ is used to convey water from the mainline to furrows in a surface irrigation system where it is then discharged through small adjustable openings in the pipe. - Gated Pipe Most industrial pumps run on what phase of power? - Three Two examples of______ -duty loads include furnace fans and air compressors. - intermittent The vertical column of water 2.31 feet high will an exert a pressure of____ psi on a gauge at the base - 1 psi A _________ is a series of graphs made by pump engineers providing information about out put characteristics of the pump. - Pump Curve Polyacrylamide is used for ______ control. - Erosion This is a type of surface irrigation where the field is perfectly level, water elevation is raised then subsides, no run off is permitted, and is more efficient that other types of surface irrigation. _______ - Basin Irrigation What is used to keep debris from plugging emitters on a drip system? - Filter A tank at the top of the hill is used to supply irrigation water to a turnip field. The elevation difference is 45 feet. Will the resulting pressure be suitable for a wheel line sprinkler system? Why or why not? - No, the Psi is not high enough. P=.433H Pressure= 19 PSI What is the function of a valve opener. Where would you find one? - Allows water to pass from mainline to the lateral, hand line or wheeline What are the four types of microirrigation systems discussed in class? - Drip Subsurface Bubbler Spray What material are most impact sprinkler heads made of? - Brass What pump would be best suited for running a chemigation system or pressure washer? - displacement Pumps in which energy is added to the water periodically and the water is contained is a set volume. - Displacement A type of impeller with a full front and back shroud. - Closed T F The discharge on a centrifugal pump can be closed for short periods of time without damage to the pump. - True Water enters a centrifugal pump at what location? - Near the eye of the impellar Another word for multiple impellers stacked on another with their own housing in a line shaft turbine is_____ - bowls What is used to keep water from leaking out of the volute? - packing and mechanical seal The theoretical maximum height an end suction centrifugal pump can lift water at sea level is - 92 feet