8 questions Basic

ECADEMY test

13 - Basic hydraulics and pump performance

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

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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 4 of 8 Basic

Identify the correct formula for calculating pump efficiency.

Question 5 of 8 Basic

What are the effects of cavitation on pumps?

Question 8 of 8 Basic

Friction loss is dependent on the [xxxxxxxx] of the fluid.

Question 8 of 8 Basic

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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 items are built-in in some motors and can stop the motor if it exceeds a preset temperature:
A: Temperature sensors
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: Identify the correct formula for calculating pump efficiency.
A: (p x H × Q)/(367 × P1)
Correct
Q: What are the effects of cavitation on pumps?
A: Pitting of impeller and pump housing
Correct
Q: How can friction loss in a system be minimised?
A: By increasing the pipe diameter
Correct
Q: Which of the following is one correct method to avoid cavitation?
A: Reduce the friction loss in the suction pipe.
Correct
Q: Friction loss is dependent on the [xxxxxxxx] of the fluid.
A: Velocity