IRRIGATION EXAM SCRIPT COMPLETE
ANSWERS GRADED A+
◉ Small ditches in a field used to direct flow of water
Answer: furrow
◉ clumping together of soil particles into a larger mass
Answer: flocculation
◉ Minimizing the number of tillage passes across a field to
conserve OM
Answer: conservation tillage
◉ T F Centrifugal pumps are more efficient at pushing water than
lifting it.
Answer: True
◉ T F Net positive suction head is the pressure under which water
will enter the eye of the impeller
Answer: True
◉ T F Total dynamic head includes static head, velocity head and
headloss due to friction
Answer: True
, ◉ T F Suction piping should be one pipe size larger than the pump
intake
Answer: True
◉ T F An increase in velocity of a fluid reduces the discharge
pressure of a pump and also requires less horsepower
Answer: False
◉ This type of pump is most likely found at a chemigation
injection point?
Answer: displacement
◉ A_______is a number that provides a measure of safety to
indicate the maximum amperage draw or horsepower this motor
is capable of producing.
Answer: Service factor
◉ ________is the rapid rise in pressure within pipes in any water
system created by the rapid change in velocity of the water
Answer: Water hammer
◉ Small implosions on the trailing edge o an impeller caused by
the imploding water vapors is called_______
Answer: cavitation
ANSWERS GRADED A+
◉ Small ditches in a field used to direct flow of water
Answer: furrow
◉ clumping together of soil particles into a larger mass
Answer: flocculation
◉ Minimizing the number of tillage passes across a field to
conserve OM
Answer: conservation tillage
◉ T F Centrifugal pumps are more efficient at pushing water than
lifting it.
Answer: True
◉ T F Net positive suction head is the pressure under which water
will enter the eye of the impeller
Answer: True
◉ T F Total dynamic head includes static head, velocity head and
headloss due to friction
Answer: True
, ◉ T F Suction piping should be one pipe size larger than the pump
intake
Answer: True
◉ T F An increase in velocity of a fluid reduces the discharge
pressure of a pump and also requires less horsepower
Answer: False
◉ This type of pump is most likely found at a chemigation
injection point?
Answer: displacement
◉ A_______is a number that provides a measure of safety to
indicate the maximum amperage draw or horsepower this motor
is capable of producing.
Answer: Service factor
◉ ________is the rapid rise in pressure within pipes in any water
system created by the rapid change in velocity of the water
Answer: Water hammer
◉ Small implosions on the trailing edge o an impeller caused by
the imploding water vapors is called_______
Answer: cavitation
