Ch-18_WWTP Revision Quiz

Define Waste Water Treatment Plant.

• Sewage treatment is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable for use.

• Sewage treatment is a type of treatment which aims to remove contaminants from sewage to produce an effluent that is suitable for use.

• Sewage treatment is a type of wastewater treatment which aims to remove contaminants from air to produce an effluent that is suitable for use.

• None of the above

Treatment of wastewater involves ________,_________ and ________ processes.

• Physical, Chemical and Freezing

• Purifying, Chemical and Freezing

• Physical, Chemical and Biological

• Physical, Melting and Freezing

The two processes involved in treatment of polluted water are ______and______.

• Aeration and Sanitization

• Aeration and Filtration

• Purification and Sanitization

• None of the above

What is sludge ?

• Liquid like faeces settle at the bottom of the water is called sludge.

• Semi-solid like faeces settle at the bottom of the water is called sludge.

• Solid like faeces settle on the top of the water is called sludge.

• Solid like faeces settle at the bottom of the water is called sludge.

By which type of bacteria is sludge decomposed ?

• Aerobic Bacteria

• Anaerobic Bacteria

• Bacillus Bacteria

• None of the above

How much percent water is the activated sludge ?

• 99%

• 98.5%

• 97%

• 97.75%

Which tree should be planted along all sewage ponds ?

• Peeple Tree

• Eucalyptus Tree

• Eurolyptus Tree

• None of the above

What 2 types of chemicals are used to disinfect the water ?

• Chlorine

• Ozone

• Silicon carbide

• Both (a) and (b)

The treated water has what level of organic material ?

• High

• Medium

• Low

• Both (a) and (c)

Why is a skimmer used ?

• To remove floatable solids such as oil and grease

• To remove floatable semi-solids such as oil and grease

• To remove non-floatable solids such as oil and grease

• None of the above