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Question 1 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 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 3 of 8
Intermediate
What are the disadvantages of the traditional gravitation system?
Question 4 of 8
Intermediate
Who has the financial responsibility in the case of flooding in most countries?
Question 5 of 8
Intermediate
Which three factors have increased the risk of flooding and back flow?
Question 6 of 8
Intermediate
Which treatment is necessary for storm water?
Question 7 of 8
Intermediate
Under which circumstances should you consider a pressurised wastewater system rather than a gravitation system
Question 8 of 8
Intermediate
Of the three anti-flooding systems, why is the lifting station the superior system?
Question 8 of 8
Intermediate
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1: 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
1: 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
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1: 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
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2: 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.
Anti-flooding valves
You can find the answer here >
2: 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.
Pumping stations
2: 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.
Lifting stations
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3: 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
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3: 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
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3: 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.
4: Who has the financial responsibility in the case of flooding in most countries?
The building owner and the building designers
4: Who has the financial responsibility in the case of flooding in most countries?
The government and the wastewater authorities
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4: Who has the financial responsibility in the case of flooding in most countries?
The building designers and the contractors
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5: 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.
5: 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
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5: 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.
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6: Which treatment is necessary for storm water?
It has to go through an oil/petrol separator
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6: Which treatment is necessary for storm water?
It has to go through a sand pressure
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6: Which treatment is necessary for storm water?
None – it is pumped directly to the recipient
7: 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.
7: 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.
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7: 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.
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8: 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
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8: 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
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8: 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