10 questions Intermediate

ECADEMY test

37 - Grundfos SQ/SQE

This course test contains 10 questions and can be retaken at any time.

You must answer all questions correctly to pass the test and complete the course.

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Question 1 of 10 Intermediate

Is the SQE pump able to provide constant pressure?

Question 3 of 10 Intermediate

Which submersible pump was replaced with a Grundfos SQ?

Question 7 of 10 Intermediate

By how much does the supply voltage decrease before the motor contactor stops the pump?

Question 8 of 10 Intermediate

What must the supply voltage lie between in order for the SQ/SQE pump to deliver a flow of water?

Question 9 of 10 Intermediate

What is the most commonly used starting method for motors in 4” conventional pumps?

Question 10 of 10 Intermediate

In addition to limiting the current draw from the mains during start-up of the pump, how does the soft-start functionality benefit operation?

Question 10 of 10 Intermediate

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Correct
Q: Is the SQE pump able to provide constant pressure?
A: Yes.
Correct
Q: Why is correct sizing of the submersible pump important?
A: Because an undersized pump will not be able to deliver the required flow and pressure and an oversized pump reduces energy efficiency, which increases operational costs.
Correct
Q: Which submersible pump was replaced with a Grundfos SQ?
A: A 4” submersible pump 
Correct
Q: The 3” SQ pump is obviously ideal for new boreholes but where can it also be used?
A: In original 4” boreholes where sediments over the years have narrowed the hole.
Correct
Q: Why is it important to protect the pump from over- and under voltage?
A: Because large variations in power supply will damage the motor over time.
Correct
Q: Where is domestic groundwater extraction typically relevant?
A: In remote areas where it is too costly to extend the municipal water supply to just a few houses.
Correct
Q: By how much does the supply voltage decrease before the motor contactor stops the pump?
A: More than 10 %
Correct
Q: What must the supply voltage lie between in order for the SQ/SQE pump to deliver a flow of water?
A: Between 150 V and 315 V
Correct
Q: What is the most commonly used starting method for motors in 4” conventional pumps?
A: Direct on line
Correct
Q: In addition to limiting the current draw from the mains during start-up of the pump, how does the soft-start functionality benefit operation?
A: It reduces the occurrence of water hammer in the pipes and minimises wear during start-up.