Related Questions

The chemical most commonly used to increase speed of sedimentation of sewage is
A Sulphuric acid
B Copper sulphate
C Lime
D Sodium permanganate
In sewage treatment, its sedimentation is speeded up by commonly adding
A Hydrochloric acid
B Lime
C Copper sulphate
D Sodium sulphate
The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally
A Less and more
B Less and less
C More and less
D More and more
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
Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is?
A Centrifugal pump
B Pneumatic ejector
C Reciprocating pump
D None of these
Which of the following pumps is used to pump sewage solids with liquid sewage without clogging the pump is?
A Centrifugal pump
B Pneumatic ejector
C Reciprocating pump
D None of these
During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
A Filtration
B Digestion
C Sedimentation
D Both B and C
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
Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is
A H2
B CH4
C CO2
D N2

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