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

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

Question 5 of 10 Intermediate

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

Question 6 of 10 Intermediate

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

Question 7 of 10 Intermediate

What happens if the water level in the well drops below the inlet?

Question 8 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: 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: What is a key installer benefit of the voltage protection in SQ/SQE?
A: Fewer service visits
Correct
Q: What is the benefit of a slow increase in speed?
A: It keeps the motor current low
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: 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: What is the most commonly used starting method for motors in 4” conventional pumps?
A: Direct on line
Correct
Q: What happens if the water level in the well drops below the inlet?
A: The motor power consumption stays the same
Correct
Q: How many times higher than nominal speed does the motor current reach during the first milliseconds?
A: Seven times higher
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: What happens if the static water level is too low?
A: The water level is brought down below the inlet of the pump