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 2 of 10 Intermediate

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

Question 3 of 10 Intermediate

3 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

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

Question 6 of 10 Intermediate

6 How long did it take to replace the pump with a Grundfos SQ?

Question 7 of 10 Intermediate

7 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

8 Is the SQE pump able to provide constant pressure?

Question 9 of 10 Intermediate

9 How many times higher than nominal speed does the motor current reach during the first milliseconds?

Question 10 of 10 Intermediate

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Correct
01.
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
02.
Q: What is a key installer benefit of the voltage protection in SQ/SQE?
A: Fewer service visits
Correct
03.
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
04.
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
05.
Q: By how much does the supply voltage decrease before the motor contactor stops the pump?
A: More than 10 %
Correct
06.
Q: How long did it take to replace the pump with a Grundfos SQ?
A: 60 minutes
Correct
07.
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
08.
Q: Is the SQE pump able to provide constant pressure?
A: Yes.
Correct
09.
Q: How many times higher than nominal speed does the motor current reach during the first milliseconds?
A: Seven times higher
Correct
10.
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.