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

Question 2 of 8 Basic

2 Identify the correct formula for calculating pump efficiency.

Question 3 of 8 Basic

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

Question 4 of 8 Basic

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

Question 5 of 8 Basic

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

Question 7 of 8 Basic

7 What are the effects of cavitation on pumps?

Question 8 of 8 Basic

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Correct
Q: How is the relationship between these three factors described in an equation?
A: P = Q x H x c
Correct
Q: Identify the correct formula for calculating pump efficiency.
A: HxQ/cxP1
Correct
Q: Select the three parameters of most interest in water pumping systems:
A: Flow, head and energy
Correct
Q: Which of the following parameters is not used for calculating pump efficiency?
A: Time
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: What are the effects of cavitation on pumps?
A: Pitting of impeller and pump housing
Correct
Q: Which of the following is one correct method to avoid cavitation?
A: Reduce the friction loss in the suction pipe.