Question 1 of 8
Intermediate

Which treatment is necessary for storm water?

Question 2 of 8
Intermediate

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

Question 3 of 8
Intermediate

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

Question 4 of 8
Intermediate

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

Question 5 of 8
Intermediate

Which method of backflow prevention has the following disadvantages: Highly sensitive to sand and solid objects in the water. In a backflow situation, it is not possible to use the sanitary facilities that are connected to this device. Storm water drains cannot be connected to this device. The device is not 100% safe and should be used only to protect secondary rooms with no vital technical installations.

Question 6 of 8
Intermediate

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

Question 7 of 8
Intermediate

What are the disadvantages of the traditional gravitation system?

Question 8 of 8
Intermediate

What is grey wastewater?

Question 8 of 8
Intermediate

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1: Which treatment is necessary for storm water?
It has to go through an oil/petrol separator
1: Which treatment is necessary for storm water?
It has to go through a sand pressure
1: Which treatment is necessary for storm water?
None – it is pumped directly to the recipient
2: 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
2: 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
2: Why is the life cycle cost of the pressurised wastewater system low?
The lifting station and the pipe system is maintenance-free
3: 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.
3: 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
3: 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.
4: 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
4: 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
4: 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
5: Which method of backflow prevention has the following disadvantages: Highly sensitive to sand and solid objects in the water. In a backflow situation, it is not possible to use the sanitary facilities that are connected to this device. Storm water drains cannot be connected to this device. The device is not 100% safe and should be used only to protect secondary rooms with no vital technical installations.
Anti-flooding valves
5: Which method of backflow prevention has the following disadvantages: Highly sensitive to sand and solid objects in the water. In a backflow situation, it is not possible to use the sanitary facilities that are connected to this device. Storm water drains cannot be connected to this device. The device is not 100% safe and should be used only to protect secondary rooms with no vital technical installations.
Pumping stations
5: Which method of backflow prevention has the following disadvantages: Highly sensitive to sand and solid objects in the water. In a backflow situation, it is not possible to use the sanitary facilities that are connected to this device. Storm water drains cannot be connected to this device. The device is not 100% safe and should be used only to protect secondary rooms with no vital technical installations.
Lifting stations
6: 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.
6: 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.
6: 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.
7: 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
7: 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
7: 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.
8: What is grey wastewater?
Water, which is discharged from showers, sinks, washing machines, canteen kitchens etc.
8: What is grey wastewater?
Water which is primarily discharged from toilets
8: What is grey wastewater?
Water which has not been affected by human influence