3
Which of the following parameters is not used for calculating pump efficiency?
4
What causes cavitation?
5
Identify the false statement.
6
Select the three parameters of most interest in water pumping systems:
7
How can friction loss in a system be minimised?
8
What are the effects of cavitation on pumps?
Test results
Congratulations. You have passed the test and completed the Basic hydraulics and pump performance
Achieved badges:
01.
Q: Friction loss is dependent on the [xxxxxxxx] of the fluid.
A: Viscosity
01.
Q: Friction loss is dependent on the [xxxxxxxx] of the fluid.
A: Velocity
01.
Q: Friction loss is dependent on the [xxxxxxxx] of the fluid.
A: Volume
02.
Q: Identify the correct formula for calculating pump efficiency.
A: P1×Q/cxH
02.
Q: Identify the correct formula for calculating pump efficiency.
A: HxQ/cxP1
02.
Q: Identify the correct formula for calculating pump efficiency.
A: HxP1/cxQ
03.
Q: Which of the following parameters is not used for calculating pump efficiency?
A: Flow
03.
Q: Which of the following parameters is not used for calculating pump efficiency?
A: Time
03.
Q: Which of the following parameters is not used for calculating pump efficiency?
A: Pressure
03.
Q: Which of the following parameters is not used for calculating pump efficiency?
A: Power Consumption
04.
Q: What causes cavitation?
A: Cavitation occurs when water changes its state from vapour to water at low pressure.
04.
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.
04.
Q: What causes cavitation?
A: Cavitation occurs when water flows through a pipe and a valve is closed quickly at a low atmospheric pressure
05.
Q: Identify the false statement.
A: Cavitation can occur when water is flowing in a pipe and a valve is closed too quickly.
05.
Q: Identify the false statement.
A: The MP204 device can protect the pump motor against all possible disturbances that may occur.
05.
Q: Identify the false statement.
A: The only way to avoid sand from entering a pump is through effective filtering before the pump inlet.
06.
Q: Select the three parameters of most interest in water pumping systems:
A: Flow, head and energy
06.
Q: Select the three parameters of most interest in water pumping systems:
A: Flow, conductivity and head
06.
Q: Select the three parameters of most interest in water pumping systems:
A: Head, turbidity and velocity
07.
Q: How can friction loss in a system be minimised?
A: By increasing the pipe diameter
07.
Q: How can friction loss in a system be minimised?
A: By using 2 smaller pumps instead of one bigger pump
07.
Q: How can friction loss in a system be minimised?
A: By adding a Tee to the piping system
08.
Q: What are the effects of cavitation on pumps?
A: Breakage of rotor
08.
Q: What are the effects of cavitation on pumps?
A: Pitting of suction pipe
08.
Q: What are the effects of cavitation on pumps?
A: Pitting of impeller and pump housing