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
In very first stage of decomposition of the organic matter in sewage
A Nitrites are formed
B Nitrates are formed
C Carbondioxide is formed
D Ammonia is formed
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
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 electricity bill of a certain establishment is partially fixed and partially varies as the number of units of electricity consumed. Wen in a certain month 540 units are sonsumed. the bill is TK 1800. In another month 620 units are consumed are the bill is Tk 2040. Inayet another month if 500 units are consumed what would be the bill (in Tk) for that month?
A 1950
B 1560
C 1840
D 1680
Sewage treatment units are designed for
A Maximum flow only
B Minimum flow only
C Average flow only
D Maximum and minimum flow
Sewage treatment units are normally designed for
A 5 - 10 years
B 15 - 20 years
C 30 - 40 years
D 40 - 50 years

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