Question 1 of 8
Intermediate

Of the three anti-flooding systems, why is the lifting station the superior system?

Question 2 of 8
Intermediate

Which three factors have increased the risk of flooding and back flow?

Question 3 of 8
Intermediate

Why is the life cycle cost of the pressurised wastewater system low?

Question 4 of 8
Intermediate

Under which circumstances should you consider a pressurised wastewater system rather than a gravitation system

Question 5 of 8
Intermediate

What are the disadvantages of the traditional gravitation system?

Question 6 of 8
Intermediate

What is grey wastewater?

Question 7 of 8
Intermediate

What are the four most common types of wastewater from commercial buildings?

Question 8 of 8
Intermediate

Which treatment is necessary for storm water?

Question 8 of 8
Intermediate

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1: Of the three anti-flooding systems, why is the lifting station the superior system?
It is located outside the building which means bad odour is never a problem
1: Of the three anti-flooding systems, why is the lifting station the superior system?
The storage volume is high and it is easy to assemble and install
1: Of the three anti-flooding systems, why is the lifting station the superior system?
It is pre-assembled and its location inside the building makes it easily accessible for service. Furthermore, it offers maximum backflow and flooding protection
2: Which three factors have increased the risk of flooding and back flow?
A higher frequency of rainfalls, increased length of rainfalls and more paved areas today than earlier.
2: Which three factors have increased the risk of flooding and back flow?
A higher frequency of rainfalls, unmaintained sewers and an increase in paved areas
2: Which three factors have increased the risk of flooding and back flow?
A higher frequency of rainfalls and buildings that are poorly equipped for increased amounts of water.
3: Why is the life cycle cost of the pressurised wastewater system low?
There are only a few gravitation pipes outside the building and the excavation cost is low
3: Why is the life cycle cost of the pressurised wastewater system low?
The initial cost of the lifting station is lower compared with a pit and there are no gravitation pipes outside the building
3: Why is the life cycle cost of the pressurised wastewater system low?
The lifting station and the pipe system is maintenance-free
4: Under which circumstances should you consider a pressurised wastewater system rather than a gravitation system
When there is a long distance between the building and the sewer main, when the sewer main is up-hill or when there are obstacles between the building and the sewer main.
4: Under which circumstances should you consider a pressurised wastewater system rather than a gravitation system
When there is a long distance between the building and the sewer main or when the sewer main is located far below the building.
4: Under which circumstances should you consider a pressurised wastewater system rather than a gravitation system
When there is a short distance between the building and the sewer main or there are obstacles between the building and sewer main.
5: What are the disadvantages of the traditional gravitation system?
Many gravitation pipes with a small diameter have to be installed outside the building and the inspection wells are expensive
5: What are the disadvantages of the traditional gravitation system?
Inspection wells are difficult to maintain and the initial cost of the pumping pit is high
5: What are the disadvantages of the traditional gravitation system?
Many gravitation pipes have to be installed outside the building and a great deal of excavation work is needed.
6: What is grey wastewater?
Water, which is discharged from showers, sinks, washing machines, canteen kitchens etc.
6: What is grey wastewater?
Water which is primarily discharged from toilets
6: What is grey wastewater?
Water which has not been affected by human influence
7: What are the four most common types of wastewater from commercial buildings?
Wastewater, storm water, drainage water and wastewater from parking areas
7: What are the four most common types of wastewater from commercial buildings?
Rainwater, wastewater, storm water and drainage water
7: What are the four most common types of wastewater from commercial buildings?
Wastewater, storm water, air-conditioning wastewater and wastewater from parking areas
8: Which treatment is necessary for storm water?
It has to go through an oil/petrol separator
8: Which treatment is necessary for storm water?
It has to go through a sand pressure
8: Which treatment is necessary for storm water?
None – it is pumped directly to the recipient