Question 1 of 8
Basic

What causes cavitation?

Question 2 of 8
Basic

Which of the following items are built-in in some motors and can stop the motor if it exceeds a preset temperature:

Question 3 of 8
Basic

Identify the correct formula for calculating pump efficiency.

Question 4 of 8
Basic

Which of the following is one correct method to avoid cavitation?

Question 5 of 8
Basic

Which of the following parameters is not used for calculating pump efficiency?

Question 6 of 8
Basic

How is the relationship between these three factors described in an equation?

Question 7 of 8
Basic

Identify the reasons for reduction in pump performance from the given options:

Question 8 of 8
Basic

Select the three parameters of most interest in water pumping systems:

Question 8 of 8
Basic

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1: What causes cavitation?
Cavitation occurs when water changes its state from vapour to water at low pressure.
1: What causes cavitation?
Cavitation occurs when water boils at 100°C and changes its state from water to vapour at normal atmospheric pressure.
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1: What causes cavitation?
Cavitation occurs when water flows through a pipe and a valve is closed quickly at a low atmospheric pressure
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2: Which of the following items are built-in in some motors and can stop the motor if it exceeds a preset temperature:
Temperature sensors
2: Which of the following items are built-in in some motors and can stop the motor if it exceeds a preset temperature:
Signal wire
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2: Which of the following items are built-in in some motors and can stop the motor if it exceeds a preset temperature:
Insulation system
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3: Identify the correct formula for calculating pump efficiency.
(P1 × Q)/(c × H)
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3: Identify the correct formula for calculating pump efficiency.
(p x H × Q)/(c × P1)
3: Identify the correct formula for calculating pump efficiency.
(H × P1)/(c × Q)
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4: Which of the following is one correct method to avoid cavitation?
Reduce the friction loss in the suction pipe.
4: Which of the following is one correct method to avoid cavitation?
Increase the flow of the pump.
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4: Which of the following is one correct method to avoid cavitation?
Lower the elevation of the suction water level.
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5: Which of the following parameters is not used for calculating pump efficiency?
Flow
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5: Which of the following parameters is not used for calculating pump efficiency?
Time
5: Which of the following parameters is not used for calculating pump efficiency?
Pressure
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5: Which of the following parameters is not used for calculating pump efficiency?
Power Consumption
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6: How is the relationship between these three factors described in an equation?
P = Q x H x c
6: How is the relationship between these three factors described in an equation?
Q = H x P x c
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6: How is the relationship between these three factors described in an equation?
P = Q/H x c
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7: Identify the reasons for reduction in pump performance from the given options:
Bad power supply
7: Identify the reasons for reduction in pump performance from the given options:
Reduction in size of irrigation zone
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7: Identify the reasons for reduction in pump performance from the given options:
Changes in energy requirements
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8: Select the three parameters of most interest in water pumping systems:
Flow, head and energy
8: Select the three parameters of most interest in water pumping systems:
Flow, conductivity and head
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8: Select the three parameters of most interest in water pumping systems:
Head, turbidity and velocity
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