The function of sedimentation tank in sewage treatment is to:

A Disinfect the sewage
B Remove water content
C Aerate the sewage
D Remove suspended solids

Correct Answer: Remove suspended solids

A sedimentation tank allows suspended particles to settle out of water or wastewater as it flows slowly through the tank, thereby providing some degree of purification. A layer of accumulated solids, called sludge, forms at the bottom of the tank and is periodically removed.
Bissoy MCQ
#General Knowledge #Chemistry

Related Questions

During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
A Filtration
B Digestion
C Sedimentation
D Both B and C
Two tanks are filled to capacity with automobile fuel. The first tank holds 600 gallons more than the second tank. If 100 gallons were to be pumped from each tank, the first tank would then contain 3 times as much fuel as the second tank. What is the total number of gallons of fuel in the two full tanks?
A 1,400
B 1,200
C 1,000
D 900
A tank is fitted with 8 pipes, some of them that fill the tank and others that are waste pipe meant to those that empty the tank can empty it in 6 hours. If all the pipes are kept open when the tank is full, it will take exactly 6 hours for the tank to empty. How many of these are these are fill pipes?
A 2
B 4
C 6
D 5
An empty fuel tank of a car was filled with A type petrol. When the tank was half-empty, it was filled with B type petrol. Again when the tank was half-empty, it was filled with A type petrol. When the tank was half-empty again, it was filled with B type petrol. What is the percentage of A type petrol at present in the tank?
A 33.5%
B 37.5%
C 40%
D 50%
An empty fuel tank of a car was filled with A type petrol. When the tank was half-empty, it was filled with B type petrol. Again when the tank was half-empty, it was filled with A type petrol. When the tank was half-empty again, it was filled with B type petrol. What is the percentage of A type petrol at present in the tank ?
A 33.5%
B 37.5%
C 40%
D 50%
In sewage treatment, its sedimentation is speeded up by commonly adding
A Hydrochloric acid
B Lime
C Copper sulphate
D Sodium sulphate
Fine grit present in sewage is removed in the __________ during sewage treatment.
A Grit chamber
B Detritus tank
C Trickling filter
D Skimming tank
__________ substances present in sewage are removed in grit chamber during sewage treatment.
A Organic
B Fatty
C Inorganic
D Dissolved
The function of skimming tank in sewage treatment is to remove __________ substances.
A Dissolved solid
B Suspended solid
C Oil & fatty
D Gritty & inorganic
The function of skimming tank in sewage treatment is to remove
A Oil and fatty substances
B Suspended solids
C Gritty substances
D Inorganic substances

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