1.3 Filtration

What is the purpose of a filter medium in a filtration process?

• To remove impurities

• To increase pressure

• To reduce temperature

• To enhance color

Which of the following filter media is effective for removing fine particles and colloids from water?

• Gravel

• Anthracite & Sand

• Activated Carbon

• Manganese

What is the primary purpose of using activated carbon as a filter medium?

• Removal of large particles

• Disinfection of water

• Absorption of impurities

• Adjustment of pH levels

What is the purpose of the backwashing process in a sand filtration system?

• To increase the flow rate of filtered water

• To change the filter medium

• To add chlorine to the filtered water

• To remove accumulated impurities from the filter medium

Which of the following factors does NOT affect the filtration rate?

• Color of the filtered substance

• Particle size

• Pressure

• Temperature

What is the primary advantage of using bag filters in industrial applications?

• Low initial cost

• Easy disposal of used filters

• High filtration efficiency

• Long service life

Which of the following filter media is commonly used for odor control in air filtration systems?

• Zeolite

• Sand

• Activated carbon

• Gravel

Which type of filtration is most effective for removing dissolved substances from water?

• Sand filtration

• Gravity filtration

• Microfiltration

• Activated carbon filtration

What is the primary advantage of using depth filters over surface filters?

• Lower cost

• Longer service life

• Smaller footprint

• Higher flow rates

Which of the following factors can cause filter clogging and reduce filtration efficiency?

• Large particle size

• Low temperature

• High viscosity of the filtered substance

• Low pressure