Related Questions

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
The sewage treatment units in which anaerobic decomposition of organic matter is used, are called
A Imhoff tanks
B Trickling filters
C Sludge sedimentation tanks
D None of these
To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of
A Hydrochloric acid
B Sulphuric acid
C Nitric acid
D Citric acid
In sewage having fully oxidised organic matter, the nitrogen exists in the form of
A Nitrites
B Nitrates
C Free ammonia
D Aluminoid nitrogen
The amount of oxygen consumed by the aerobic bacterias which cause the aerobic biological decomposition of sewage, is known
A Bio-Chemical Oxygen Demand (B.O.D.)
B Dissolved Oxygen (D.O.)
C Chemical Oxygen Demand (C.O.D.)
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
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

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