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Irrigation Exam 2 Practice Test –Questions and Answers
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Irrigation Exam 2 Practice Test –Questions and Answers
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
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