What are the effects of cavitation on pumps?
Select the three parameters of most interest in water pumping systems:
Identify the false statement.
How can friction loss in a system be minimised?
What causes cavitation?
How is the relationship between these three factors described in an equation?
Which of the following is one correct method to avoid cavitation?
Test results
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Q: What are the effects of cavitation on pumps?
A: Breakage of rotor
Q: What are the effects of cavitation on pumps?
A: Pitting of suction pipe
Q: What are the effects of cavitation on pumps?
A: Pitting of impeller and pump housing
Q: Friction loss is dependent on the [xxxxxxxx] of the fluid.
A: Viscosity
Q: Friction loss is dependent on the [xxxxxxxx] of the fluid.
A: Velocity
Q: Friction loss is dependent on the [xxxxxxxx] of the fluid.
A: Volume
Q: Select the three parameters of most interest in water pumping systems:
A: Flow, head and energy
Q: Select the three parameters of most interest in water pumping systems:
A: Flow, conductivity and head
Q: Select the three parameters of most interest in water pumping systems:
A: Head, turbidity and velocity
Q: Identify the false statement.
A: Cavitation can occur when water is flowing in a pipe and a valve is closed too quickly.
Q: Identify the false statement.
A: The MP204 device can protect the pump motor against all possible disturbances that may occur.
Q: Identify the false statement.
A: The only way to avoid sand from entering a pump is through effective filtering before the pump inlet.
Q: How can friction loss in a system be minimised?
A: By increasing the pipe diameter
Q: How can friction loss in a system be minimised?
A: By using 2 smaller pumps instead of one bigger pump
Q: How can friction loss in a system be minimised?
A: By adding a Tee to the piping system
Q: What causes cavitation?
A: Cavitation occurs when water changes its state from vapour to water at low pressure.
Q: What causes cavitation?
A: Cavitation occurs when water boils at 100°C and changes its state from water to vapour at normal atmospheric pressure.
Q: What causes cavitation?
A: Cavitation occurs when water flows through a pipe and a valve is closed quickly at a low atmospheric pressure
Q: How is the relationship between these three factors described in an equation?
A: P = Q x H x c
Q: How is the relationship between these three factors described in an equation?
A: Q = H x P x c
Q: How is the relationship between these three factors described in an equation?
A: P = Q/H x c
Q: Which of the following is one correct method to avoid cavitation?
A: Reduce the friction loss in the suction pipe.
Q: Which of the following is one correct method to avoid cavitation?
A: Increase the flow of the pump.
Q: Which of the following is one correct method to avoid cavitation?
A: Lower the elevation of the suction water level.