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

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

Question 3 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 is the most commonly used starting method for motors in 4” conventional pumps?

Question 6 of 10 Intermediate

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

Question 7 of 10 Intermediate

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

Question 9 of 10 Intermediate

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

Question 10 of 10 Intermediate

What happens if the static water level is too low?

Question 10 of 10 Intermediate

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Correct
Q: By how much does the supply voltage decrease before the motor contactor stops the pump?
A: More than 10 %
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: 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: How does the integrated dry-running protection work?
A: It automatically shuts down the pump if water shortage is detected.
Correct
Q: What is the most commonly used starting method for motors in 4” conventional pumps?
A: Direct on line
Correct
Q: How long did it take to replace the pump with a Grundfos SQ?
A: 60 minutes
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: 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: How many times higher than nominal speed does the motor current reach during the first milliseconds?
A: Seven times higher
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