8 questions Intermediate

ECADEMY test

Wastewater transport

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Question 8 of 8 Intermediate

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Correct
Q: What is drainage water?
A: Wastewater without toilet waste or impurities like paper, diapers and textile fibres.
Correct
Q: What is one of the main challenges facing utility companies today in relation to transportation of wastewater?
A: Lower water consumption has changed the composition of wastewater, which now has a higher proportion of dry solid content than before.
Correct
Q: What is the purpose of the start level sensor?
A: It activates the pump when the water reaches this level.
Correct
Q: What is parallel operation?
A: When two or more pumps operate side by side simultaneously.
Correct
Q: What is the main disadvantage of over-dimensioning a wastewater pit?
A: The wastewater stays in the pit too long, which leads to sedimentation.
Correct
Q: How far below ground should the manifold – or the discharge pipe – be installed?
A: It depends on local regulation but typically 1 meter down.
Correct
Q: Why is it important that the distance between the start and stop level is not too long?
A: If the distance is too long it reduces the number of cycles, which may cause sedimentation because the water stays in the pit too long.
Correct
Q: What are the main virtues of the S-tube® impeller?
A: It offers both excellent efficiency and large free passage.