Sewer System

What is the acceleration due to gravity at sea level?

• 9.80665 m/s^2

• 8.9 m/s^2

• 10 m/s^2

• 9.8 km/h^2

What was a common feature of cities before modern sewage systems?

• Underground pipes

• Open sewers

• Closed drainage

• Septic tanks

Why is it important to manage waste in cities?

• It smells bad

• It contains harmful bacteria

• It can block roads

• It looks unpleasant

How do ideal sewer systems transport waste?

• Using trucks

• Through gravity

• With manual labor

• Using animals

Tags

NGSS.MS-PS2-2

What is the diameter of a typical sewer main in a large area?

• 1 to 2 feet

• 3 to 5 feet

• 10 to 12 feet

• 6 to 8 feet

What role do manholes play in sewer systems?

• They store excess waste

• They filter the sewage

• They provide ventilation

• They are entry points for maintenance

What is a major challenge in designing sewer systems for modern cities?

• Finding enough water

• Dealing with solid waste

• Preventing leaks

• Managing varying elevations

What happens if a house is below the elevation of the wastewater treatment plant?

• The waste is pumped using stations

• The waste is manually carried

• The house must be relocated

• The waste cannot be moved

What is the purpose of grinder pumps in sewer systems?

• To pump sewage over hills

• To reduce waste size

• To clean the sewage

• To generate electricity

Why are pumping stations usually placed far from human populations?

• To prevent health hazards

• To save space in cities

• Because of the smell

• Because of the noise