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

Which submersible pump was replaced with a Grundfos SQ?

Question 5 of 10 Intermediate

What happens if the static water level is too low?

Question 6 of 10 Intermediate

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

Question 8 of 10 Intermediate

Is the SQE pump able to provide constant pressure?

Question 10 of 10 Intermediate

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

Question 10 of 10 Intermediate

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Correct
Q: Which submersible pump was replaced with a Grundfos SQ?
A: A 4” submersible pump 
Correct
Q: What is the benefit of a slow increase in speed?
A: It keeps the motor current low
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: 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: What happens if the static water level is too low?
A: The water level is brought down below the inlet of the pump
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: How does the integrated dry-running protection work?
A: It automatically shuts down the pump if water shortage is detected.
Correct
Q: Is the SQE pump able to provide constant pressure?
A: Yes.
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: By how much does the supply voltage decrease before the motor contactor stops the pump?
A: More than 10 %