1
What are the four most common types of wastewater from commercial buildings?
2
What is grey wastewater?
3
Which three factors have increased the risk of flooding and back flow?
4
Under which circumstances should you consider a pressurised wastewater system rather than a gravitation system
5
What are the disadvantages of the traditional gravitation system?
6
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.
7
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.
8
Which method of backflow prevention has the following advantages: Offers maximum backflow and flooding protection. Ideal for safeguarding electrical and other high value equipment. Offers unlimited use of sanitary facilities in case of backflow. Is easily serviced. Can be installed in a building’s storm water drains. Is not sensitive to sand and solid objects in the water.
Test results
01.
Q: What are the four most common types of wastewater from commercial buildings?
A: Wastewater, storm water, drainage water and wastewater from parking areas
01.
Q: What are the four most common types of wastewater from commercial buildings?
A: Rainwater, wastewater, storm water and drainage water
01.
Q: What are the four most common types of wastewater from commercial buildings?
A: Wastewater, storm water, air-conditioning wastewater and wastewater from parking areas
02.
Q: What is grey wastewater?
A: Water, which is discharged from showers, sinks, washing machines, canteen kitchens etc.
02.
Q: What is grey wastewater?
A: Water which is primarily discharged from toilets
02.
Q: What is grey wastewater?
A: Water which has not been affected by human influence
03.
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.
03.
Q: Which three factors have increased the risk of flooding and back flow?
A: A higher frequency of rainfalls, unmaintained sewers and an increase in paved areas
03.
Q: Which three factors have increased the risk of flooding and back flow?
A: A higher frequency of rainfalls and buildings that are poorly equipped for increased amounts of water.
04.
Q: Under which circumstances should you consider a pressurised wastewater system rather than a gravitation system
A: 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.
04.
Q: Under which circumstances should you consider a pressurised wastewater system rather than a gravitation system
A: When there is a long distance between the building and the sewer main or when the sewer main is located far below the building.
04.
Q: Under which circumstances should you consider a pressurised wastewater system rather than a gravitation system
A: When there is a short distance between the building and the sewer main or there are obstacles between the building and sewer main.
05.
Q: What are the disadvantages of the traditional gravitation system?
A: Many gravitation pipes with a small diameter have to be installed outside the building and the inspection wells are expensive
05.
Q: What are the disadvantages of the traditional gravitation system?
A: Inspection wells are difficult to maintain and the initial cost of the pumping pit is high
05.
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.
06.
Q: 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.
A: Anti-flooding valves
06.
Q: 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.
A: Pumping stations
06.
Q: 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.
A: Lifting stations
07.
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: Anti-flooding valves
07.
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
07.
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: Lifting stations
08.
Q: Which method of backflow prevention has the following advantages: Offers maximum backflow and flooding protection. Ideal for safeguarding electrical and other high value equipment. Offers unlimited use of sanitary facilities in case of backflow. Is easily serviced. Can be installed in a building’s storm water drains. Is not sensitive to sand and solid objects in the water.
A: Anti-flooding valves
08.
Q: Which method of backflow prevention has the following advantages: Offers maximum backflow and flooding protection. Ideal for safeguarding electrical and other high value equipment. Offers unlimited use of sanitary facilities in case of backflow. Is easily serviced. Can be installed in a building’s storm water drains. Is not sensitive to sand and solid objects in the water.
A: Pumping stations
08.
Q: Which method of backflow prevention has the following advantages: Offers maximum backflow and flooding protection. Ideal for safeguarding electrical and other high value equipment. Offers unlimited use of sanitary facilities in case of backflow. Is easily serviced. Can be installed in a building’s storm water drains. Is not sensitive to sand and solid objects in the water.
A: Lifting stations