8 questions Basic

ECADEMY test

Basic hydraulics and pump performance

This course test contains 8 questions and can be retaken at any time.

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Question 1 of 8 Basic

1 What are the effects of cavitation on pumps?

Question 2 of 8 Basic

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

Question 4 of 8 Basic

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

Question 8 of 8 Basic

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

Question 8 of 8 Basic

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Correct
Q: What are the effects of cavitation on pumps?
A: Pitting of impeller and pump housing
Correct
Q: Which of the following items are built-in in some motors and can stop the motor if it exceeds a preset temperature:
A: Temperature sensors
Correct
Q: What causes cavitation?
A: Cavitation occurs when water changes its state from vapour to water at low pressure.
Correct
Q: Which of the following parameters is not used for calculating pump efficiency?
A: Time
Correct
Q: Identify the false statement.
A: Cavitation can occur when water is flowing in a pipe and a valve is closed too quickly.
Correct
Q: Which of the following is one correct method to avoid cavitation?
A: Reduce the friction loss in the suction pipe.
Correct
Q: Identify the true statement.
A: If all the parameters are recorded immediately after the pump has been installed, you can use them as benchmark against future data.
Correct
Q: Select the three parameters of most interest in water pumping systems:
A: Flow, head and energy