Irrigation Exam 2 Practice Test
Questions with Correct Answers
T F Surge irrigation is used along with center pivot swing arms to provide more uniform
irrigation? - ANSWERSFalse
T F Worn or cracked gaskets can be replaced to reduce leaks between sections of
aluminum sprinkler pipe by the farmer? - ANSWERSTrue
T F Gaskets between 3 inch hand line sprinklers are made of only one material,
rubberized leather. - ANSWERSFalse
T F The lateral carries water from the pump to the mainline. - ANSWERSFalse
T F Organic matter percentage and soil texture affect the intake or infiltration rate of
water? - ANSWERSTrue
T F Trimming an impeller means to put it into a different volute case? - ANSWERSFalse
T F If water is applied to a soil in excess of the infiltration rate, runoff will occur? -
ANSWERSTrue
T F The volute case is a protective covering on a center pivot "big gun?" -
ANSWERSFalse
T F Pump panels contain the electrical protection and on/off switch for pump motors? -
ANSWERSTrue
T F A displacement pump can have the discharge valve closed most of the way without
damaging the pump? - ANSWERSFalse
________impellers can pass the largest debris but have lower pressure capabilities. -
ANSWERSOpen
_______ 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. -
ANSWERSGated Pipe
Most industrial pumps run on what phase of power? - ANSWERSThree
Two examples of______ -duty loads include furnace fans and air compressors. -
ANSWERSintermittent
, The vertical column of water 2.31 feet high will an exert a pressure of____ psi on a
gauge at the base - ANSWERS1 psi
A _________ is a series of graphs made by pump engineers providing information
about out put characteristics of the pump. - ANSWERSPump Curve
Polyacrylamide is used for ______ control. - ANSWERSErosion
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. _______ - ANSWERSBasin Irrigation
What is used to keep debris from plugging emitters on a drip system? - ANSWERSFilter
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? - ANSWERSNo, the Psi is not high enough.
P=.433H Pressure= 19 PSI
What is the function of a valve opener. Where would you find one? - ANSWERSAllows
water to pass from mainline to the lateral, hand line or wheeline
What are the four types of microirrigation systems discussed in class? - ANSWERSDrip
Subsurface
Bubbler
Spray
What material are most impact sprinkler heads made of? - ANSWERSBrass
What pump would be best suited for running a chemigation system or pressure washer?
- ANSWERSdisplacement
Pumps in which energy is added to the water periodically and the water is contained is a
set volume. - ANSWERSDisplacement
A type of impeller with a full front and back shroud. - ANSWERSClosed
T F The discharge on a centrifugal pump can be closed for short periods of time without
damage to the pump. - ANSWERSTrue
Water enters a centrifugal pump at what location? - ANSWERSNear the eye of the
impellar
Questions with Correct Answers
T F Surge irrigation is used along with center pivot swing arms to provide more uniform
irrigation? - ANSWERSFalse
T F Worn or cracked gaskets can be replaced to reduce leaks between sections of
aluminum sprinkler pipe by the farmer? - ANSWERSTrue
T F Gaskets between 3 inch hand line sprinklers are made of only one material,
rubberized leather. - ANSWERSFalse
T F The lateral carries water from the pump to the mainline. - ANSWERSFalse
T F Organic matter percentage and soil texture affect the intake or infiltration rate of
water? - ANSWERSTrue
T F Trimming an impeller means to put it into a different volute case? - ANSWERSFalse
T F If water is applied to a soil in excess of the infiltration rate, runoff will occur? -
ANSWERSTrue
T F The volute case is a protective covering on a center pivot "big gun?" -
ANSWERSFalse
T F Pump panels contain the electrical protection and on/off switch for pump motors? -
ANSWERSTrue
T F A displacement pump can have the discharge valve closed most of the way without
damaging the pump? - ANSWERSFalse
________impellers can pass the largest debris but have lower pressure capabilities. -
ANSWERSOpen
_______ 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. -
ANSWERSGated Pipe
Most industrial pumps run on what phase of power? - ANSWERSThree
Two examples of______ -duty loads include furnace fans and air compressors. -
ANSWERSintermittent
, The vertical column of water 2.31 feet high will an exert a pressure of____ psi on a
gauge at the base - ANSWERS1 psi
A _________ is a series of graphs made by pump engineers providing information
about out put characteristics of the pump. - ANSWERSPump Curve
Polyacrylamide is used for ______ control. - ANSWERSErosion
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. _______ - ANSWERSBasin Irrigation
What is used to keep debris from plugging emitters on a drip system? - ANSWERSFilter
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? - ANSWERSNo, the Psi is not high enough.
P=.433H Pressure= 19 PSI
What is the function of a valve opener. Where would you find one? - ANSWERSAllows
water to pass from mainline to the lateral, hand line or wheeline
What are the four types of microirrigation systems discussed in class? - ANSWERSDrip
Subsurface
Bubbler
Spray
What material are most impact sprinkler heads made of? - ANSWERSBrass
What pump would be best suited for running a chemigation system or pressure washer?
- ANSWERSdisplacement
Pumps in which energy is added to the water periodically and the water is contained is a
set volume. - ANSWERSDisplacement
A type of impeller with a full front and back shroud. - ANSWERSClosed
T F The discharge on a centrifugal pump can be closed for short periods of time without
damage to the pump. - ANSWERSTrue
Water enters a centrifugal pump at what location? - ANSWERSNear the eye of the
impellar
