Test your knowledge

Question 1 of 8

Intermediate

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

Question 2 of 8

Intermediate

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

The storage volume is high and it is easy to assemble and install

It is pre-assembled and its location inside the building makes it easily accessible for service. Furthermore, it offers maximum backflow and flooding protection

Question 3 of 8

Intermediate

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.

Question 4 of 8

Intermediate

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

The building owner and the building designers

The government and the wastewater authorities

The building designers and the contractors

Question 5 of 8

Intermediate

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

Question 6 of 8

Intermediate

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

Question 7 of 8

Intermediate

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

Question 8 of 8

Intermediate

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.

A higher frequency of rainfalls, unmaintained sewers and an increase in paved areas

A higher frequency of rainfalls and buildings that are poorly equipped for increased amounts of water.

Question 8 of 8

Intermediate

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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

You can find the answer here >

1: What is grey wastewater?

Water which has not been affected by human influence

You can find the answer here >

2: 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

You can find the answer here >

2: 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

You can find the answer here >

2: 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

3: 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

You can find the answer here >

3: 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

You can find the answer here >

3: 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.

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

The building owner and the building designers

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

The government and the wastewater authorities

You can find the answer here >

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

The building designers and the contractors

You can find the answer here >

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

You can find the answer here >

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

You can find the answer here >

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

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

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

Rainwater, wastewater, storm water and drainage water

You can find the answer here >

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

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

You can find the answer here >

7: 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

You can find the answer here >

Lifting stations

You can find the answer here >

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

You can find the answer here >

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.

You can find the answer here >