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Question 1 of 8
Basic
Identify the reasons for reduction in pump performance from the given options:
Question 2 of 8
Basic
How is the relationship between these three factors described in an equation?
Question 3 of 8
Basic
What are the effects of cavitation on pumps?
Question 4 of 8
Basic
Identify the correct formula for calculating pump efficiency.
Question 5 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 6 of 8
Basic
Which of the following parameters is not used for calculating pump efficiency?
Question 7 of 8
Basic
Friction loss is dependent on the [xxxxxxxx] of the fluid.
Question 8 of 8
Basic
What causes cavitation?
Question 8 of 8
Basic
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1: Identify the reasons for reduction in pump performance from the given options:
Bad power supply
1: Identify the reasons for reduction in pump performance from the given options:
Reduction in size of irrigation zone
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1: Identify the reasons for reduction in pump performance from the given options:
Changes in energy requirements
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2: How is the relationship between these three factors described in an equation?
P = Q x H x c
2: How is the relationship between these three factors described in an equation?
Q = H x P x c
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2: How is the relationship between these three factors described in an equation?
P = Q/H x c
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3: What are the effects of cavitation on pumps?
Breakage of rotor
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3: What are the effects of cavitation on pumps?
Pitting of suction pipe
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3: What are the effects of cavitation on pumps?
Pitting of impeller and pump housing
4: Identify the correct formula for calculating pump efficiency.
(P1 × Q)/(c × H)
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4: Identify the correct formula for calculating pump efficiency.
(p x H × Q)/(c × P1)
4: Identify the correct formula for calculating pump efficiency.
(H × P1)/(c × Q)
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5: Which of the following items are built-in in some motors and can stop the motor if it exceeds a preset temperature:
Temperature sensors
5: 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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5: 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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6: Which of the following parameters is not used for calculating pump efficiency?
6: Which of the following parameters is not used for calculating pump efficiency?
Time
6: Which of the following parameters is not used for calculating pump efficiency?
Pressure
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6: Which of the following parameters is not used for calculating pump efficiency?
Power Consumption
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7: Friction loss is dependent on the [xxxxxxxx] of the fluid.
Viscosity
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7: Friction loss is dependent on the [xxxxxxxx] of the fluid.
Velocity
7: Friction loss is dependent on the [xxxxxxxx] of the fluid.
8: What causes cavitation?
Cavitation occurs when water changes its state from vapour to water at low pressure.
8: 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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8: 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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