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 4 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 5 of 10 Intermediate

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

Question 7 of 10 Intermediate

Which of these isn’t a key dry-run protection benefit for the installer?

Question 9 of 10 Intermediate

Which submersible pump was replaced with a Grundfos SQ?

Question 10 of 10 Intermediate

Which are the two most common applications in which a Grundfos SQ/SQE submersible pump is used?

Question 10 of 10 Intermediate

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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: Why must the pump unit be installed below the dynamic water table?
A: To avoid the risk of dry-running during operation.
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.
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: 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 of these isn’t a key dry-run protection benefit for the installer?
A: He doesn’t have to worry about water bursts
Correct
Q: Which protection features does the SQE have?
A: Voltage handling, soft start, dry-running protection and overload protection.
Correct
Q: Which submersible pump was replaced with a Grundfos SQ?
A: A 4” submersible pump 
Correct
Q: Which are the two most common applications in which a Grundfos SQ/SQE submersible pump is used?
A: Domestic water supply & Irrigation