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Vraag 1 van 8

Gemiddeld

What is grey wastewater?

Water, which is discharged from showers, sinks, washing machines, canteen kitchens etc.

Water which is primarily discharged from toilets

Water which has not been affected by human influence

Vraag 2 van 8

Gemiddeld

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

Pumping stations

Lifting stations

Vraag 3 van 8

Gemiddeld

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

The initial cost of the lifting station is lower compared with a pit and there are no gravitation pipes outside the building

The lifting station and the pipe system is maintenance-free

Vraag 4 van 8

Gemiddeld

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

Inspection wells are difficult to maintain and the initial cost of the pumping pit is high

Many gravitation pipes have to be installed outside the building and a great deal of excavation work is needed.

Vraag 5 van 8

Gemiddeld

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.

When there is a long distance between the building and the sewer main or when the sewer main is located far below the building.

When there is a short distance between the building and the sewer main or there are obstacles between the building and sewer main.

Vraag 6 van 8

Gemiddeld

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

Pumping stations

Lifting stations

Vraag 7 van 8

Gemiddeld

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

Wastewater, storm water, drainage water and wastewater from parking areas

Rainwater, wastewater, storm water and drainage water

Wastewater, storm water, air-conditioning wastewater and wastewater from parking areas

Vraag 8 van 8

Gemiddeld

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.

Anti-flooding valves

Pumping stations

Lifting stations

Vraag 8 van 8

Gemiddeld

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Wat voor beoordeling geeft u deze cursus?

1: What is grey wastewater?

Water, which is discharged from showers, sinks, washing machines, canteen kitchens etc.

1: What is grey wastewater?

Water which is primarily discharged from toilets

U vindt het antwoord hier >

1: What is grey wastewater?

Water which has not been affected by human influence

U vindt het antwoord hier >

2: 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

Pumping stations

U vindt het antwoord hier >

Lifting stations

U vindt het antwoord hier >

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

U vindt het antwoord hier >

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

U vindt het antwoord hier >

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

U vindt het antwoord hier >

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

U vindt het antwoord hier >

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: 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.

5: 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.

U vindt het antwoord hier >

5: 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.

U vindt het antwoord hier >

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

U vindt het antwoord hier >

Pumping stations

Lifting stations

U vindt het antwoord hier >

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

U vindt het antwoord hier >

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

Wastewater, storm water, air-conditioning wastewater and wastewater from parking areas

U vindt het antwoord hier >

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.

Anti-flooding valves

U vindt het antwoord hier >

Pumping stations

U vindt het antwoord hier >

Lifting stations