CW - Water Treatment and filtration - PP5

What is the primary function of a slow sand filter?

• Removing micro-organisms, algae, and turbidity

• Increasing water temperature

• Adding minerals to water

• Removing large debris from water

What is the typical depth range for the tank dimensions of a slow sand filter?

• 0.1-0.5m

• 0.5-1.5m

• 1.5-2.5m

• 2.5-3.5m

What is the size range of the sand used in the filtration process of a slow sand filter?

• 0.05-0.10mm

• 0.10-0.15mm

• 0.15-0.30mm

• 0.30-0.50mm

What is the function of the schmutzdecke in a slow sand filter?

• To add minerals to the water

• To remove micro-organisms from water

• To increase water flow rate

• To reduce water temperature

How often should the schmutzdecke be removed to maintain filtration efficiency?

• Every 1-2 weeks

• Every 2-10 weeks

• Every 10-20 weeks

• Every 20-30 weeks

What is the purpose of using dual filters in a slow sand filter system?

• To increase water temperature

• To ensure continuous operation during cleaning

• To add minerals to the water

• To reduce water flow rate

How much water should slow sand filters be sized to deliver per hour for every 1m² of filter?

• 0.1-0.2m³

• 0.2-0.3m³

• 0.1-0.3m³

• 0.3-0.4m³