10 questions Intermediate

ECADEMY test

37 - Grundfos SQ/SQE

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

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Question 3 of 10 Intermediate

What is a key installer benefit of the voltage protection in SQ/SQE?

Question 4 of 10 Intermediate

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

Question 5 of 10 Intermediate

Which submersible pump was replaced with a Grundfos SQ?

Question 7 of 10 Intermediate

What happens if the water level in the well drops below the inlet?

Question 9 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: 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: Which protection features does the SQE have?
A: Voltage handling, soft start, dry-running protection and overload protection.
Correct
Q: What is a key installer benefit of the voltage protection in SQ/SQE?
A: Fewer service visits
Correct
Q: Which are the two most common applications in which a Grundfos SQ/SQE submersible pump is used?
A: Domestic water supply & Irrigation
Correct
Q: Which submersible pump was replaced with a Grundfos SQ?
A: A 4” submersible pump 
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: What happens if the water level in the well drops below the inlet?
A: The motor power consumption stays the same
Correct
Q: What is the benefit of a slow increase in speed?
A: It keeps the motor current low
Correct
Q: By how much does the supply voltage decrease before the motor contactor stops the pump?
A: More than 10 %
Correct
Q: Why must the pump unit be installed below the dynamic water table?
A: To avoid the risk of dry-running during operation.