Question 1 of 6
Intermediate

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

Question 2 of 6
Intermediate

What happens if the static water level is too low?

Question 3 of 6
Intermediate

Which submersible pump was replaced with a Grundfos SQ?

Question 4 of 6
Intermediate

Where is domestic groundwater extraction typically relevant?

Question 5 of 6
Intermediate

Why is it important to protect the pump from over- and under voltage?

Question 6 of 6
Intermediate

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

Question 6 of 6
Intermediate

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1: What is the most commonly used starting method for motors in 4” conventional pumps?
Direct on line
1: What is the most commonly used starting method for motors in 4” conventional pumps?
Star delta starters
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1: What is the most commonly used starting method for motors in 4” conventional pumps?
Auto transformer
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2: What happens if the static water level is too low?
The pump overheats
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2: What happens if the static water level is too low?
The water level is brought down below the inlet of the pump
2: What happens if the static water level is too low?
The motor shuts down
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3: Which submersible pump was replaced with a Grundfos SQ?
A 4” submersible pump 
3: Which submersible pump was replaced with a Grundfos SQ?
A 3” submersible pump
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3: Which submersible pump was replaced with a Grundfos SQ?
A 5” submersible pump 
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4: Where is domestic groundwater extraction typically relevant?
In big cities.
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4: Where is domestic groundwater extraction typically relevant?
In remote areas where it is too costly to extend the municipal water supply to just a few houses.
4: Where is domestic groundwater extraction typically relevant?
In smaller and medium sized towns.
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5: Why is it important to protect the pump from over- and under voltage?
Because large variations in power supply will damage the motor over time.
5: Why is it important to protect the pump from over- and under voltage?
To avoid burning the house fuses.
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5: Why is it important to protect the pump from over- and under voltage?
To minimise the power consumption.
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6: What happens if the water level in the well drops below the inlet?
The motor power consumption drops
6: What happens if the water level in the well drops below the inlet?
The motor power consumption stays the same
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6: What happens if the water level in the well drops below the inlet?
The motor power consumption increases
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