Waste Water Engineering If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains Methane Carbon dioxide Oxygen Hydrogen sulphide Methane Carbon dioxide Oxygen Hydrogen sulphide ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Acid regression stage of sludge digestion at a temperature 21°C extends over a period of 90 days 15 days 30 days 60 days 90 days 15 days 30 days 60 days ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Design period of 40 to 50 years is adopted for All listed here Branch sewers Trunk sewers Main sewers All listed here Branch sewers Trunk sewers Main sewers ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The amount of oxygen consumed by the aerobic bacterias which cause the aerobic biological decomposition of sewage, is known Chemical Oxygen Demand (C.O.D.) None of these Bio-Chemical Oxygen Demand (B.O.D.) Dissolved Oxygen (D.O.) Chemical Oxygen Demand (C.O.D.) None of these Bio-Chemical Oxygen Demand (B.O.D.) Dissolved Oxygen (D.O.) ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In very first stage of decomposition of the organic matter in sewage Nitrates are formed Nitrites are formed Ammonia is formed Carbondioxide is formed Nitrates are formed Nitrites are formed Ammonia is formed Carbondioxide is formed ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The recommended detention period for grit chambers is 5 minutes 3 minutes 2 minutes 1 minute 5 minutes 3 minutes 2 minutes 1 minute ANSWER DOWNLOAD EXAMIANS APP
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