8 questions Intermediate

ECADEMY test

3 - Wastewater

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Question 1 of 8 Intermediate

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.

Question 4 of 8 Intermediate

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

Question 8 of 8 Intermediate

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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
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.
Correct
Q: Which treatment is necessary for storm water?
A: None – it is pumped directly to the recipient
Correct
Q: Who has the financial responsibility in the case of flooding in most countries?
A: The building owner and the building designers
Correct
Q: Of the three anti-flooding systems, why is the lifting station the superior system?
A: It is pre-assembled and its location inside the building makes it easily accessible for service. Furthermore, it offers maximum backflow and flooding protection
Correct
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
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
Q: What is grey wastewater?
A: Water, which is discharged from showers, sinks, washing machines, canteen kitchens etc.