10 questions Intermediate

ECADEMY test

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 3 of 10 Intermediate

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

Question 6 of 10 Intermediate

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

Question 7 of 10 Intermediate

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

Question 8 of 10 Intermediate

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

Question 10 of 10 Intermediate

10 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: Which protection features does the SQE have?
A: Voltage handling, soft start, dry-running protection and overload protection.
Correct
02.
Q: Why must the pump unit be installed below the dynamic water table?
A: To avoid the risk of dry-running during operation.
Correct
03.
Q: By how much does the supply voltage decrease before the motor contactor stops the pump?
A: More than 10 %
Correct
04.
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
05.
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
06.
Q: What is the most commonly used starting method for motors in 4” conventional pumps?
A: Direct on line
Correct
07.
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
08.
Q: What is a key installer benefit of the voltage protection in SQ/SQE?
A: Fewer service visits
Correct
09.
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
10.
Q: How many times higher than nominal speed does the motor current reach during the first milliseconds?
A: Seven times higher