Vraag 1 van 8
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What are the four most common types of wastewater from commercial buildings?

Vraag 2 van 8
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Who has the financial responsibility in the case of flooding in most countries?

Vraag 3 van 8
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Which treatment is necessary for storm water?

Vraag 4 van 8
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What are the disadvantages of the traditional gravitation system?

Vraag 5 van 8
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Why is the life cycle cost of the pressurised wastewater system low?

Vraag 6 van 8
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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.

Vraag 7 van 8
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Of the three anti-flooding systems, why is the lifting station the superior system?

Vraag 8 van 8
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Which three factors have increased the risk of flooding and back flow?

Vraag 8 van 8
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1: What are the four most common types of wastewater from commercial buildings?
Wastewater, storm water, drainage water and wastewater from parking areas
1: What are the four most common types of wastewater from commercial buildings?
Rainwater, wastewater, storm water and drainage water
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1: What are the four most common types of wastewater from commercial buildings?
Wastewater, storm water, air-conditioning wastewater and wastewater from parking areas
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2: Who has the financial responsibility in the case of flooding in most countries?
The building owner and the building designers
2: Who has the financial responsibility in the case of flooding in most countries?
The government and the wastewater authorities
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2: Who has the financial responsibility in the case of flooding in most countries?
The building designers and the contractors
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3: Which treatment is necessary for storm water?
It has to go through an oil/petrol separator
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3: Which treatment is necessary for storm water?
It has to go through a sand pressure
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3: Which treatment is necessary for storm water?
None – it is pumped directly to the recipient
4: 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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4: 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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4: 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.
5: 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
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5: 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
5: Why is the life cycle cost of the pressurised wastewater system low?
The lifting station and the pipe system is maintenance-free
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6: 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
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6: 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
6: 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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7: 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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7: 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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7: 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
8: 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.
8: 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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8: 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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