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 5 of 10 Intermediate

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

Question 7 of 10 Intermediate

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

Question 9 of 10 Intermediate

9 Which of these isn’t a key dry-run protection benefit for the installer?

Question 10 of 10 Intermediate

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

Question 10 of 10 Intermediate

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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: 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: 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: How long did it take to replace the pump with a Grundfos SQ?
A: 60 minutes
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: How many times higher than nominal speed does the motor current reach during the first milliseconds?
A: Seven times higher
Correct
Q: How does the integrated dry-running protection work?
A: It automatically shuts down the pump if water shortage is detected.
Correct
Q: Which of these isn’t a key dry-run protection benefit for the installer?
A: He doesn’t have to worry about water bursts
Correct
Q: What is the most commonly used starting method for motors in 4” conventional pumps?
A: Direct on line