8 questions Intermediate

ECADEMY test

Wastewater

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Question 2 of 8 Intermediate

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.

Question 3 of 8 Intermediate

3 Who has the financial responsibility in the case of flooding in most countries?

Question 5 of 8 Intermediate

5 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 8 of 8 Intermediate

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Correct
01.
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.
Correct
02.
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
Correct
03.
Q: Who has the financial responsibility in the case of flooding in most countries?
A: The building owner and the building designers
Correct
04.
Q: Why is the life cycle cost of the pressurised wastewater system low?
A: The initial cost of the lifting station is lower compared with a pit and there are no gravitation pipes outside the building
Correct
05.
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
Correct
06.
Q: Which treatment is necessary for storm water?
A: None – it is pumped directly to the recipient
Correct
07.
Q: What are the four most common types of wastewater from commercial buildings?
A: Wastewater, storm water, drainage water and wastewater from parking areas
Correct
08.
Q: What is grey wastewater?
A: Water, which is discharged from showers, sinks, washing machines, canteen kitchens etc.