8 questions Intermediate

ECADEMY test

3 - Wastewater

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Question 2 of 8 Intermediate

Which method of backflow prevention has the following advantages: Offers maximum backflow and flooding protection: Is not sensitive to fat, grease, sands and solids in the water. Makes it possible to use sanitary facilities in case of backflow. Offers protection for paved areas. Can be connected to buildings’ storm water drains.

Question 7 of 8 Intermediate

Who has the financial responsibility in the case of flooding in most countries?

Question 8 of 8 Intermediate

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Correct
Q: What are the disadvantages of the traditional gravitation system?
A: Many gravitation pipes have to be installed outside the building and a great deal of excavation work is needed.
Correct
Q: Which method of backflow prevention has the following advantages: Offers maximum backflow and flooding protection: Is not sensitive to fat, grease, sands and solids in the water. Makes it possible to use sanitary facilities in case of backflow. Offers protection for paved areas. Can be connected to buildings’ storm water drains.
A: Pumping stations
Correct
Q: What are the four most common types of wastewater from commercial buildings?
A: Wastewater, storm water, drainage water and wastewater from parking areas
Correct
Q: Why is the life cycle cost of the pressurised wastewater system low?
A: The initial cost of the lifting station is lower compared with a pit and there are no gravitation pipes outside the building
Correct
Q: Which three factors have increased the risk of flooding and back flow?
A: A higher frequency of rainfalls, increased length of rainfalls and more paved areas today than earlier.
Correct
Q: Of the three anti-flooding systems, why is the lifting station the superior system?
A: It is pre-assembled and its location inside the building makes it easily accessible for service. Furthermore, it offers maximum backflow and flooding protection
Correct
Q: Who has the financial responsibility in the case of flooding in most countries?
A: The building owner and the building designers
Correct
Q: What is grey wastewater?
A: Water, which is discharged from showers, sinks, washing machines, canteen kitchens etc.