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
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
The cooling effect in a cooling tower can be speeded up by
A Increasing the air velocity and area of exposed wet surface
B Reducing the barometric pressure
C Reducing the humidity of the air
D All of the above
The most commonly used substance to speed up the sedimentation of sewage is
A Lime
B Sulphuric acid
C Chlorine
D Sodium bisulphite
The chemical most commonly used to increase speed of sedimentation of sewage is
A Sulphuric acid
B Copper sulphate
C Lime
D Sodium permanganate
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 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
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
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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