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 1 of 10 Intermediate

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

Question 4 of 10 Intermediate

4 What happens if the static water level is too low?

Question 5 of 10 Intermediate

5 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 7 of 10 Intermediate

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

Question 9 of 10 Intermediate

9 Which submersible pump was replaced with a Grundfos SQ?

Question 10 of 10 Intermediate

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Correct
01.
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
02.
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
03.
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
04.
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
05.
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
06.
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
07.
Q: What is the most commonly used starting method for motors in 4” conventional pumps?
A: Direct on line
Correct
08.
Q: Which protection features does the SQE have?
A: Voltage handling, soft start, dry-running protection and overload protection.
Correct
09.
Q: Which submersible pump was replaced with a Grundfos SQ?
A: A 4” submersible pump 
Correct
10.
Q: Why must the pump unit be installed below the dynamic water table?
A: To avoid the risk of dry-running during operation.